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Aehr Test Systems
(NASDAQ:AEHR) 

AEHR stock logo

Aehr Test Systems primarily designs, engineers, manufactures, and sells test and burn-in equipment for use in the semiconductor industry in the United States, Asia, and Europe. It provides full wafer contact test systems, test during burn-in systems, test fixtures, and related accessories. The compa...

Founded: 1977
Full Time Employees: 71
Founder: Rhea J. Posedel 
CEO: Gayn Erickson  
Sector: Technology
Industry: Semiconductor Equipment & Materials

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At a glance:
  • Exposure to Silicon Carbide (SiC) Device Testing Demand: Aehr’s revenue outlook is closely tied to adoption of SiC power semiconductors in electric vehicles, charging infrastructure, and industrial applications, which can drive demand for high-volume burn-in and test solutions.
  • Customer Concentration and Order Timing Can Drive Volatility: Results can swing meaningfully based on the timing of large customer orders and shipment schedules, with customer concentration making quarterly revenue and profitability less predictable.
  • Platform and Consumables Mix Influences Margins: Gross margin and earnings can vary depending on the mix between system sales and higher-margin consumables/wafer contactor-related revenue, along with production scale and utilization.
  • Scaling Operations to Meet Demand While Managing Execution Risk: As demand ramps, the company’s ability to manage supply chain, manufacturing throughput, and product delivery timelines is key to converting backlog/pipeline into revenue without margin erosion.
Bull Thesis:
  • Dominant Position in Silicon Carbide (SiC) Burn-in: Aehr Test Systems holds a leading position in the critical full wafer contact burn-in and test market for Silicon Carbide (SiC) power semiconductors. As SiC adoption accelerates in electric vehicles (EVs), renewable energy, and industrial applications, AEHR is uniquely positioned to benefit from the increasing demand for reliable SiC devices, which require extensive burn-in.
  • Long-term SiC Market Growth Trajectory: Despite short-term fluctuations in customer orders, the long-term outlook for the SiC market remains robust. Industry analysts project significant growth in SiC demand over the next decade, driven by the global transition to EVs and the need for more efficient power electronics. AEHR's technology is essential for ensuring the quality and reliability of these high-value components, providing a sustained tailwind for the company.
  • Expanding Market Opportunities Beyond SiC: While SiC is a primary driver, AEHR's proprietary FOX-P™ and ABT™ systems are also applicable to other high-growth markets, including silicon photonics for AI/data centers, memory, and other advanced semiconductor devices. This diversification provides additional revenue streams and reduces reliance on a single market segment, opening new avenues for growth as these technologies mature.
  • Strong IP and Technological Advantage: Aehr possesses strong intellectual property and a technological advantage with its full wafer contact parallel test and burn-in solutions. This technology offers significant cost and efficiency benefits for high-volume production compared to traditional methods, making it a preferred choice for leading semiconductor manufacturers and creating a competitive moat.
Bear Thesis:
  • Significant Customer Concentration Risk: A substantial portion of Aehr's revenue has historically come from a few large customers, particularly a major SiC manufacturer. Delays, reduced capital expenditures, or changes in production plans from these key customers can lead to significant revenue volatility and missed financial targets, as seen in recent quarters.
  • Lumpy Order Flow and Revenue Volatility: As a capital equipment provider, AEHR's revenue is inherently lumpy, driven by large, infrequent orders rather than consistent, recurring sales. This makes forecasting challenging and can lead to significant quarter-over-quarter fluctuations in financial performance, making the stock susceptible to sharp movements based on order announcements or lack thereof.
  • Macroeconomic Headwinds and EV Market Slowdown: A broader economic slowdown, rising interest rates, or a deceleration in the adoption rate of electric vehicles could negatively impact demand for SiC power semiconductors. This, in turn, would reduce the need for AEHR's test and burn-in equipment, affecting future order intake and revenue growth.
  • Inventory Build-up and Potential Write-downs: Aehr has been building inventory in anticipation of future orders, particularly for its FOX-P systems. If these anticipated orders do not materialize as expected or are significantly delayed, the company could face risks of inventory obsolescence, write-downs, and negative impacts on cash flow and profitability.
Main Competitors:
  • Teradyne ($TER) (FLEX, J750, UltraFLEX, Magnum, ETS platforms (various ATE systems)), Teradyne is a leading global supplier of automatic test equipment (ATE) for semiconductors, system test, and wireless products. While Aehr specializes in full wafer contact burn-in, Teradyne competes for the overall semiconductor test budget, offering a broad range of testers for power devices, mixed-signal, and memory, which can be alternative or complementary solutions to Aehr's offerings for certain test phases and device types.
  • Advantest Corporation ($ATEYY) (V93000, T2000, T5800 series (various ATE systems)), Advantest is another major global provider of ATE, offering solutions for SoC, memory, and power semiconductor testing. Similar to Teradyne, Advantest competes with Aehr for semiconductor manufacturers' capital expenditure on test equipment, providing alternative test methodologies and systems for devices that Aehr's full wafer contact burn-in systems target, particularly in the power and memory segments.
  • Cohu, Inc. ($COHU) (Diamondx, Eclipse, cDragon (test handlers), various contactors and thermal solutions), Cohu provides back-end semiconductor equipment, including test handlers, contactors, and thermal subsystems. While Aehr focuses on the test and burn-in system itself (especially full wafer contact), Cohu's products are integral to the overall test cell. Cohu competes by offering integrated test solutions and components that can be used with various testers, including those for power devices, potentially offering different approaches to the overall test and burn-in process or competing for the same capital expenditure in the back-end.
Moat:
Aehr Test Systems operates in a specialized niche within the semiconductor test equipment market, primarily focusing on full wafer contact burn-in and test solutions, with a strong emphasis on silicon carbide (SiC) power semiconductors, photonics, and memory. Its primary moat lies in its proprietary FOX™ platform, which enables highly efficient, parallel full wafer contact burn-in, a capability not widely replicated by larger, more general Automatic Test Equipment (ATE) providers. This technology offers significant cost and time savings for high-volume production, particularly for critical components like those used in electric vehicles and data centers. Competition comes from several angles: broad ATE providers (like Teradyne and Advantest) who offer alternative test methodologies and compete for overall test budgets; back-end equipment providers (like Cohu) who offer complementary or integrated solutions for the test cell; and to a lesser extent, in-house solutions developed by large semiconductor manufacturers. Aehr's competitive advantage is its unique technology for high-volume, cost-effective full wafer burn-in, especially in the rapidly growing SiC market, strengthened by its intellectual property and early market penetration in this specific, high-growth segment.
Income Statements:
Quarterly
Annual
    Unit: USD2026-02-27 2025-11-28 2025-08-29 2025-05-30 2025-02-28 2024-11-29 2024-08-30 2024-05-31 2024-02-29 2023-11-30 2023-08-31 2023-05-31 2023-02-28 2022-11-30 2022-08-31 2022-05-31 2022-02-28 2021-11-30 2021-08-31 2021-05-31 2021-02-28 2020-11-30 2020-08-31 2020-05-31 2020-02-29 2019-11-30 2019-08-31 2019-05-31 2019-02-28 2018-11-30 2018-08-31 2018-05-31 2018-02-28 2017-11-30 2017-08-31 2017-05-31 2017-02-28 2016-11-30 2016-08-31 2016-05-31 2016-05-30 2016-02-29 2015-11-30 2015-08-31 2015-05-31 2015-02-28 2014-11-30 2014-08-31 2014-05-31 2014-02-28 2013-11-30 2013-08-31 2013-05-31 2013-02-28 2012-11-30 2012-08-31 2012-05-31 2012-02-29 2011-11-30 
                                                               
      total revenue
    10,313,000 9,884,000 10,969,000 14,089,000 18,307,000 13,453,000 13,119,000 16,600,000 7,563,000 21,431,000 20,624,000 22,269,000 17,206,000 14,815,000 10,671,000 20,289,000 15,283,000 9,611,000 5,646,000 7,638,000 5,267,000 1,683,000 2,012,000 3,773,000 6,111,000 6,874,000 5,533,000 7,242,000 3,163,000 5,911,000 4,740,000 7,269,000 7,393,000 7,923,000 6,970,000 6,683,000 2,681,000 4,216,000 5,318,000  1,571,000 1,677,000 4,620,000 6,633,000 1,818,000 2,027,000 2,615,000 3,558,000 5,370,000 5,612,000 4,950,000 3,752,000 3,306,500 3,340,000 5,054,000 4,832,000 2,711,250 2,855,000 3,860,000 
      yoy
    -43.67% -26.53% -16.39% -15.13% 142.06% -37.23% -36.39% -25.46% -56.04% 44.66% 93.27% 9.76% 12.58% 54.15% 89.00% 165.63% 190.17% 471.06% 180.62% 102.44% -13.81% -75.52% -63.64% -47.90% 93.20% 16.29% 16.73% -0.37% -57.22% -25.39% -31.99% 8.77% 175.76% 87.93% 31.06%  70.66% 151.40% 15.11%  -13.59% -17.27% 76.67% 86.42% -66.15% -63.88% -47.17% -5.17% 62.41% 68.02% -2.06% -22.35% 21.95% 16.99% 30.93%     
      qoq
    4.34% -9.89% -22.14% -23.04% 36.08% 2.55% -20.97% 119.49% -64.71% 3.91% -7.39% 29.43% 16.14% 38.83% -47.40% 32.76% 59.02% 70.23% -26.08% 45.02% 212.95% -16.35% -46.67% -38.26% -11.10% 24.24% -23.60% 128.96% -46.49% 24.70% -34.79% -1.68% -6.69% 13.67% 4.29% 149.27% -36.41% -20.72%   -6.32% -63.70% -30.35% 264.85% -10.31% -22.49% -26.50% -33.74% -4.31% 13.37% 31.93% 13.47% -1.00% -33.91% 4.59% 78.22% -5.04% -26.04%  
      total cost of revenue
    6,945,000 7,339,000 7,250,000 9,817,000 11,124,000 8,053,000 6,041,000 8,152,000 4,407,000 10,473,000 10,643,000 10,790,000 8,331,000 6,904,000 6,190,000 9,821,000 8,886,000 5,092,000 3,365,000 4,104,000 3,373,000 1,306,000 1,785,000 3,866,000 3,120,000 3,672,000 3,262,000 3,863,000 2,891,000 3,513,000 3,187,000 4,108,000 4,217,000 4,792,000 4,052,000 4,075,000 2,178,000 2,753,000 3,112,000  1,669,000 1,508,000 2,929,000 3,250,000 1,136,000 1,175,000 1,921,000 1,948,000 2,456,000 2,742,000 2,456,000 1,808,000 1,970,000 2,575,000 2,791,000 2,376,000 2,507,000 1,747,000 2,732,000 
      gross profit
    3,368,000 2,545,000 3,719,000 4,272,000 7,183,000 5,400,000 7,078,000 8,448,000 3,156,000 10,958,000 9,981,000 11,479,000 8,875,000 7,911,000 4,481,000 10,468,000 6,397,000 4,519,000 2,281,000 3,534,000 1,894,000 377,000 227,000 -93,000 2,991,000 3,202,000 2,271,000 3,379,000 272,000 2,398,000 1,553,000 3,161,000 3,176,000 3,131,000 2,918,000 2,608,000 503,000 1,463,000 2,206,000  -98,000 169,000 1,691,000 3,383,000 682,000 852,000 694,000 1,610,000 2,914,000 2,870,000 2,494,000 1,944,000 1,292,000 765,000 2,263,000 2,456,000 2,169,000 1,108,000 1,128,000 
      yoy
    -53.11% -52.87% -47.46% -49.43% 127.60% -50.72% -29.09% -26.40% -64.44% 38.52% 122.74% 9.66% 38.74% 75.06% 96.45% 196.21% 237.75% 1098.67% 904.85% -3900.00% -36.68% -88.23% -90.00% -102.75% 999.63% 33.53% 46.23% 6.90% -91.44% -23.41% -46.78% 21.20% 531.41% 114.01% 32.28%  -613.27% 765.68% 30.46%  -114.37% -80.16% 143.66% 110.12% -76.60% -70.31% -72.17% -17.18% 125.54% 275.16% 10.21% -20.85% -40.43% -30.96% 100.62%     
      qoq
    32.34% -31.57% -12.94% -40.53% 33.02% -23.71% -16.22% 167.68% -71.20% 9.79% -13.05% 29.34% 12.19% 76.55% -57.19% 63.64% 41.56% 98.11% -35.46% 86.59% 402.39% 66.08% -344.09% -103.11% -6.59% 41.00% -32.79% 1142.28% -88.66% 54.41% -50.87% -0.47% 1.44% 7.30% 11.89% 418.49% -65.62% -33.68%   -157.99% -90.01% -50.01% 396.04% -19.95% 22.77% -56.89% -44.75% 1.53% 15.08% 28.29% 50.46% 68.89% -66.20% -7.86% 13.23% 95.76% -1.77%  
      gross margin %
    32.66% 25.75% 33.90% 30.32% 39.24% 40.14% 53.95% 50.89% 41.73% 51.13% 48.40% 51.55% 51.58% 53.40% 41.99% 51.59% 41.86% 47.02% 40.40% 46.27% 35.96% 22.40% 11.28% -2.46% 48.94% 46.58% 41.04% 46.66% 8.60% 40.57% 32.76% 43.49% 42.96% 39.52% 41.87% 39.02% 18.76% 34.70% 41.48%  -6.24% 10.08% 36.60% 51.00% 37.51% 42.03% 26.54% 45.25% 54.26% 51.14% 50.38% 51.81% 39.07% 22.90% 44.78% 50.83% 80.00% 38.81% 29.22% 
      operating expenses:
                                                               
      research and development
    3,167,000 2,972,000 2,849,000 2,686,000 3,140,000 2,276,000 2,361,000 2,151,000 2,139,000 1,972,000 2,457,000 2,253,000 1,832,000 1,551,000 1,498,000 1,655,000 1,529,000 1,313,000 1,321,000 1,029,000 903,000 820,000 900,000 854,000 845,000 795,000 892,000 1,120,000 931,000 986,000 1,116,000 1,096,000 1,040,000 1,090,000 955,000 1,309,000 1,248,000 1,040,000 1,060,000  1,046,000 1,293,000 923,000 1,062,000 967,000 1,031,000 1,105,000 959,000 1,016,000 907,000 798,000 681,000 634,000 685,000 962,000 930,000 1,134,000 933,000 1,039,000 
      selling, general and administrative
    4,430,000 4,434,000 4,717,000 3,926,000 5,162,000 4,637,000 4,558,000 3,756,000 3,063,000 3,518,000 3,409,000 3,587,000 3,250,000 2,875,000 2,525,000 2,993,000 2,612,000 2,489,000 1,953,000 1,904,000 1,643,000 1,501,000 1,514,000 1,674,000 1,891,000 2,157,000 1,808,000 2,018,000 1,850,000 1,977,000 1,879,000 1,816,000 1,829,000 1,854,000 1,791,000 1,905,000 1,724,000 1,707,000 1,716,000  1,722,000 1,695,000 1,713,000 1,845,000 1,526,000 1,584,000 1,736,000 1,624,000 1,685,000 1,701,000 1,517,000 1,420,000 1,504,000 1,511,000 2,068,000 1,789,000 1,872,000 1,525,000 1,528,000 
      restructuring charges
     -213,000 219,000                                                         
      total operating expenses
    7,597,000 7,193,000 7,785,000 7,476,000 8,302,000 6,913,000 6,919,000 5,907,000 5,202,000 5,490,000 5,866,000 5,840,000 5,082,000 4,426,000 4,023,000 4,648,000 4,141,000 3,802,000 3,274,000 2,933,000 2,546,000 2,321,000 2,414,000 2,748,000 2,736,000 2,952,000 2,700,000 3,256,000 3,388,000 2,963,000 2,995,000 2,912,000 2,869,000 2,944,000 2,746,000 3,214,000 2,972,000 2,747,000 2,776,000  2,768,000 2,988,000 2,636,000 2,907,000 2,493,000 2,615,000 2,841,000 2,583,000 2,701,000 2,608,000 2,315,000 2,101,000 2,138,000 2,196,000 3,030,000 2,719,000 3,006,000 2,458,000 2,567,000 
      income from operations
    -4,229,000 -4,648,000 -4,066,000 -3,204,000 -1,119,000 -1,513,000 159,000 2,541,000 -2,046,000 5,468,000 4,115,000 5,639,000 3,793,000 3,485,000 458,000 5,820,000 2,256,000 717,000 -993,000 601,000 -652,000 -1,944,000 -2,187,000 -2,841,000 255,000 250,000 -429,000 123,000 -3,116,000 -565,000 -1,442,000 249,000 307,000 187,000 172,000 -606,000 -2,469,000 -1,284,000 -570,000  -2,866,000 -2,819,000 -945,000 476,000 -1,811,000 -1,763,000 -2,147,000 -973,000 213,000 262,000 179,000 -157,000 -846,000 -1,431,000 -767,000 -263,000 -837,000 -1,350,000 -1,439,000 
      yoy
    277.93% 207.20% -2657.23% -226.09% -45.31% -127.67% -96.14% -54.94% -153.94% 56.90% 798.47% -3.11% 68.13% 386.05% -146.12% 868.39% -446.01% -136.88% -54.60% -121.15% -355.69% -877.60% 409.79% -2409.76% -108.18% -144.25% -70.25% -50.60% -1114.98% -402.14% -938.37% -141.09% -112.43% -114.56% -130.18%  -13.85% -54.45% -39.68%  58.26% 59.90% -55.99% -148.92% -950.23% -772.90% -1299.44% 519.75% -125.18% -118.31% -123.34% -40.30% 1.08% 6.00% -46.70%     
      qoq
    -9.01% 14.31% 26.90% 186.33% -26.04% -1051.57% -93.74% -224.19% -137.42% 32.88% -27.03% 48.67% 8.84% 660.92% -92.13% 157.98% 214.64% -172.21% -265.22% -192.18% -66.46% -11.11% -23.02% -1214.12% 2.00% -158.28% -448.78% -103.95% 451.50% -60.82% -679.12% -18.89% 64.17% 8.72% -128.38% -75.46% 92.29% 125.26%   1.67% 198.31% -298.53% -126.28% 2.72% -17.89% 120.66% -556.81% -18.70% 46.37% -214.01% -81.44% -40.88% 86.57% 191.63% -68.58% -38.00% -6.18%  
      operating margin %
    -41.01% -47.03% -37.07% -22.74% -6.11% -11.25% 1.21% 15.31% -27.05% 25.51% 19.95% 25.32% 22.04% 23.52% 4.29% 28.69% 14.76% 7.46% -17.59% 7.87% -12.38% -115.51% -108.70% -75.30% 4.17% 3.64% -7.75% 1.70% -98.51% -9.56% -30.42% 3.43% 4.15% 2.36% 2.47% -9.07% -92.09% -30.46% -10.72%  -182.43% -168.10% -20.45% 7.18% -99.61% -86.98% -82.10% -27.35% 3.97% 4.67% 3.62% -4.18% -25.59% -42.84% -15.18% -5.44% -30.87% -47.29% -37.28% 
      interest income
    240,000 194,000 179,000 222,000 270,000 228,000 681,000 592,000 584,000 631,000 581,000 487,000 374,000 263,000 121,000 22,000 1,000   -11,000 -10,000 -12,000 -13,000 -17,000 13,000 2,000 12,000                                 
      other income
    -12,000 10,000 1,051,000 -2,750 -25,000 40,000  -10,000 -2,000 10,000 -6,000 -4,000 -18,000 -5,000 24,000 -38,000 10,000 35,000 23,000 -23,000 -39,000 -6,000 -94,000 -17,000 -9,000 5,000 10,000 17,000 -11,000 29,000 9,000 39,000 -33,000 -7,000  -59,000 -2,000 43,000   1,750 -24,000 55,000 -24,000 10,000 110,000 60,000 31,000     10,000 -9,000 -15,000  64,000 7,000 58,000 
      loss before income tax benefit
    -4,001,000 -4,444,000                     -108,000             -1,205,500 -2,649,000    -929,500 -3,008,000 -1,027,000     -956,000    -195,000 -636,750 -1,458,000      
      income tax benefit
    -798,000 -1,214,000 -752,000 -87,000 -231,000 -217,000      -11,000 -17,000 -18,000 -14,000 -10,000 -24,000 -34,000 -23,000  -34,000 -4,000 215,000 -10,000 -14,000 -6,000 -6,000 -6,000 2,000 -19,000 -4,000 -8,000 91,000 -15,000 5,000 11,000 -2,000 -30,000 -4,000  1,000 33,000 -21,000 -23,000 2,000 -66,000 -19,000 49,000 10,000 -22,000 -2,000 29,000 -12,000  -16,000 -2,000 32,000 18,000 -8,000 
      net income
    -3,203,000 -3,230,000 -2,084,000 -2,899,000 -643,000 -1,028,000 660,000 23,864,000 -1,471,000 6,089,000 4,674,000 6,111,000 4,132,000 3,725,000 589,000 5,794,000 2,243,000 717,000 696,000 567,000 -735,000 -1,966,000 107,000 -2,885,000 245,000 251,000 -413,000 110,000 -3,201,000 -629,000 -1,515,000 191,000 267,000 60,000 10,000 -795,000 -2,651,000 -1,452,000 -755,000  -3,056,000 -2,975,000 -1,048,000 294,000 -1,900,000 -1,726,000 -2,114,000 -907,000 239,000 212,000 137,000 -166,000 -854,000 -1,458,000 -811,000 -296,000 -779,000 -1,361,000 -1,373,000 
      yoy
    398.13% 214.20% -415.76% -112.15% -56.29% -116.88% -85.88% 290.51% -135.60% 63.46% 693.55% 5.47% 84.22% 419.53% -15.37% 921.87% -405.17% -136.47% 550.47% -119.65% -400.00% -883.27% -125.91% -2722.73% -107.65% -139.90% -72.74% -42.41% -1298.88% -1148.33% -15250.00% -124.03% -110.07% -104.13% -101.32%  -13.25% -51.19% -27.96%  60.84% 72.36% -50.43% -132.41% -894.98% -914.15% -1643.07% 446.39% -127.99% -114.54% -116.89% -43.92% 9.63% 7.13% -40.93%     
      qoq
    -0.84% 54.99% -28.11% 350.86% -37.45% -255.76% -97.23% -1722.30% -124.16% 30.27% -23.51% 47.89% 10.93% 532.43% -89.83% 158.31% 212.83% 3.02% 22.75% -177.14% -62.61% -1937.38% -103.71% -1277.55% -2.39% -160.77% -475.45% -103.44% 408.90% -58.48% -893.19% -28.46% 345.00% 500.00% -101.26% -70.01% 82.58% 92.32%   2.72% 183.87% -456.46% -115.47% 10.08% -18.35% 133.08% -479.50% 12.74% 54.74% -182.53% -80.56% -41.43% 79.78% 173.99% -62.00% -42.76% -0.87%  
      net income margin %
    -31.06% -32.68% -19.00% -20.58% -3.51% -7.64% 5.03% 143.76% -19.45% 28.41% 22.66% 27.44% 24.01% 25.14% 5.52% 28.56% 14.68% 7.46% 12.33% 7.42% -13.95% -116.82% 5.32% -76.46% 4.01% 3.65% -7.46% 1.52% -101.20% -10.64% -31.96% 2.63% 3.61% 0.76% 0.14% -11.90% -98.88% -34.44% -14.20%  -194.53% -177.40% -22.68% 4.43% -104.51% -85.15% -80.84% -25.49% 4.45% 3.78% 2.77% -4.42% -25.83% -43.65% -16.05% -6.13% -28.73% -47.67% -35.57% 
      net income per share
                                         -0.09       -0.1 -0.14 -0.18 -0.08 0.02 0.02 0.01 -0.02 -0.07 -0.16 -0.09 -0.03 -0.073 -0.15 -0.15 
      basic
    -0.1 -0.11 -0.07 -0.1 -0.02 -0.03 0.02 0.83 -0.05 0.21 0.16 0.078 0.15 0.14 0.02 0.035 0.08 0.03  0.02 -0.03 -0.08   0.01 0.01  0.01 -0.14 -0.03 -0.07  0.01      -0.06                     
      diluted
    -0.1 -0.11 -0.07 -0.1 -0.02 -0.03 0.02 0.81 -0.05 0.2 0.16 0.073 0.14 0.13 0.02 0.033 0.08 0.03  0.02 -0.03 -0.08   0.01 0.01  0.01 -0.14 -0.03 -0.07 0.01 0.01      -0.06                     
      shares used in per share calculations:
                                                               
      basic
    30,695 30,177 29,923 81 29,733 29,659 29,107 45 28,866 28,801 28,649 6,892.75 27,893 27,579 27,242 6,421 26,871 26,205 23,999 67 23,525 23,396 23,248 59 22,937 22,823  73 22,459 22,294 22,190 101 21,832 21,645 21,417    13,317     12,963 116 12,677 11,724  2,701.75 10,982 10,806  273 9,363 9,300 9,166 27 9,055 8,980 
      diluted
    30,695 30,177 29,923 81 29,733 29,659 29,632 -53 28,866 29,769 29,632 7,270 29,373 29,080 28,788 6,877.5 28,854 28,342 25,356 67 23,525 23,396 23,455 -58 23,130 22,912  73 22,459 22,294 22,190 -56 22,641 22,883 22,991    13,317     13,814 116 12,677 11,724  2,895.75 12,277 11,839  273 9,363 9,300 9,166 27 9,055 8,980 
      income before income taxes expense
      -2,836,000                                                         
      revenue:
                                                               
      product
       10,205,000 16,681,000 11,985,000 12,154,000 15,805,000 6,730,000 19,837,000 19,357,000                                                 
      services
       1,014,750 1,626,000 1,468,000 965,000 795,000 833,000 1,594,000 1,267,000                                                 
      cost of revenue:
                                                               
      income before income tax expense
       -2,986,000 -874,000 -1,245,000      2,123,750 4,149,000 3,743,000 603,000           257,000    -610,000    75,000     -751,000                     
      other expense
          -26,000                            -60,000    -3,000          -21,250 -21,000 -30,000 -34,000    -19,000    
      income before provision for income taxes
          814,000 2,333,750 -1,464,000 6,109,000 4,690,000                                                 
      provision for income taxes
          154,000 10,750 7,000 20,000 16,000                                                 
      gain from forgiveness of ppp loan
                      1,698,000                                         
      net gain from dissolution of aehr test systems japan
                          2,186,000                                     
      income before income tax benefit
                   5,804,000 2,267,000 751,000 719,000 567,000 -701,000 -1,962,000  27,250 259,000   116,000 -3,203,000  -1,511,000 199,000 176,000  5,000         317,000 -1,177,750 -1,660,000 -2,095,000  229,000 234,000 139,000     -294,000    
      interest expense
                     -1,000 -9,000         -24,000 -76,000 -74,000 -78,000 -89,000 -98,000 -105,000 -107,000 -141,000 -178,000 -181,000 -178,000  -168,000 -165,000 -137,000 -135,000 -101,000 -7,000 -8,000 -14,000 -5,000 -7,000 -10,000 -4,000 -6,000 -18,000 -13,000 -12,000    
      net income per share
                                         -0.09       -0.1 -0.14 -0.18 -0.08 0.02 0.02 0.01 -0.02 -0.07 -0.16 -0.09 -0.03 -0.073 -0.15 -0.15 
      basic and diluted
                      0.03        -0.02         -0.08 -0.16    -0.073 -0.23 -0.08 0.02                
      less: net income attributable to the noncontrolling interest
                                                               
      net income attributable to aehr test systems common shareholders
                       567,000 -735,000  107,000 -2,885,000 245,000 251,000  110,000 -3,201,000 -629,000 -1,515,000 191,000 267,000 60,000     -755,000     294,000 -1,900,000 -1,726,000   239,000 212,000      -296,000    
      restructuring
                               118,000 607,000                               
      loss before income tax expense
                              -407,000           -1,422,000                      
      net loss attributable to aehr test systems common shareholders
                              -413,000         -1,214,500 -2,651,000 -1,452,000   -932,250 -2,975,000 -1,048,000     -907,000    -166,000 -854,000 -1,458,000      
      shares used in per share calculations:
                                                               
      basic and diluted
                              22,708         3,852.75 16,672    3,264.5 13,164 13,048     11,391    10,635        
      net income attributable to aehr test systems common shareholders
                                      10,000                         
      net income per share
                                         -0.09       -0.1 -0.14 -0.18 -0.08 0.02 0.02 0.01 -0.02 -0.07 -0.16 -0.09 -0.03 -0.073 -0.15 -0.15 
      shares used in per share calculations: basic and diluted
                                         16,029                      
      less: net income attributable to  the noncontrolling interest
                                                               
      net income attributable to aehr test systems common shareolders
                                                  -2,114,000    137,000         
      gain on sale of long-term investment
                                                               
      loss before income tax
                                                               
      benefit
                                                          -795,000     
      less: net income attributable
                                                               
      to the noncontrolling interest
                                                               
      net loss attributable to aehr
                                                               
      test systems common shareholders
                                                          -811,000     
      gain on bankruptcy claim
                                                               
      expense
                                                            -656,750 -1,343,000 -1,381,000 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-02-27 2025-11-28 2025-08-29 2025-05-30 2025-02-28 2024-11-29 2024-08-30 2024-05-31 2024-02-29 2023-11-30 2023-08-31 2023-05-31 2023-02-28 2022-11-30 2022-08-31 2022-05-31 2022-02-28 2021-11-30 2021-08-31 2021-05-31 2021-02-28 2020-11-30 2020-08-31 2020-05-31 2020-02-29 2019-11-30 2019-08-31 2019-05-31 2019-02-28 2018-11-30 2018-08-31 2018-05-31 2018-02-28 2017-11-30 2017-08-31 2017-05-31 2017-02-28 2016-11-30 2016-08-31 2016-05-31 2016-05-30 2016-02-29 2015-11-30 2015-08-31 2015-05-31 2015-02-28 2014-11-30 2014-08-31 2014-05-31 2014-02-28 2013-11-30 2013-08-31 2013-05-31 2013-02-28 2012-11-30 2012-08-31 2012-05-31 2012-02-29 2011-11-30 
                                                                 
        assets
                                                                 
        current assets:
                                                                 
        cash and cash equivalents
      36,911,000 30,835,000 22,708,000 24,529,000 29,411,000 32,217,000 37,830,000 49,159,000 47,581,000 50,514,000 50,955,000 30,054,000 17,188,000 18,874,000 36,147,000 31,484,000 32,020,000 35,031,000 6,530,000 4,582,000 4,738,000 3,449,000 6,313,000 5,433,000 5,058,000 5,302,000 5,266,000 5,428,000 12,300,000 14,002,000 15,864,000 16,848,000 9,077,000 9,959,000 13,993,000 17,803,000 2,039,000 5,154,000 2,342,000 939,000 939,000 2,472,000 1,955,000 3,653,000 5,527,000 2,274,000 3,596,000 2,075,000 1,809,000 1,846,000 2,494,000 2,435,000 2,324,000 1,381,000 1,192,000 1,901,000 2,073,000 2,975,000 3,126,000 
        accounts receivable
      11,808,000 10,282,000 13,055,000 14,191,000 11,991,000 7,333,000 8,561,000 9,796,000 5,468,000 4,573,000 13,161,000 16,594,000 11,389,000 10,156,000 5,116,000 12,859,000 8,543,000 7,391,000 4,264,000 5,202,000 2,721,000 1,429,000 1,116,000 3,717,000 3,511,000 5,231,000 3,287,000 4,859,000 1,944,000 3,868,000 2,272,000 2,856,000 4,673,000 3,490,000 5,301,000 4,010,000 1,596,000 1,429,000 1,774,000 522,000 522,000 1,947,000 2,503,000 2,628,000 1,383,000 597,000 1,352,000 2,098,000 3,390,000 3,378,000 2,735,000 2,860,000 2,632,000 1,570,000   2,588,000   
        inventories
      41,162,000 42,723,000 41,842,000 41,997,000 42,329,000 43,776,000 42,973,000 37,470,000 38,085,000 33,817,000 31,557,000 23,908,000 21,619,000 17,972,000 17,233,000 15,051,000 14,152,000 13,033,000 10,146,000 8,849,000 8,339,000 9,057,000 8,102,000 7,989,000 9,330,000 9,800,000 9,217,000 9,061,000 9,189,000 9,983,000 9,585,000 9,049,000 9,368,000 8,225,000 9,020,000 6,604,000 7,207,000 6,069,000 6,031,000 7,033,000 7,033,000 7,378,000 7,419,000 7,258,000 7,123,000 6,854,000 6,035,000 6,304,000 6,148,000 5,931,000 5,650,000 5,369,000 5,369,000 5,722,000 6,444,000 6,710,000 6,070,000 5,650,000 5,579,000 
        prepaid expenses and other current assets
      6,019,000 4,349,000 6,447,000 8,061,000 7,968,000 5,195,000 3,555,000 1,423,000 1,215,000 2,861,000 540,000 621,000 808,000 823,000 833,000  559,000 622,000 759,000  571,000 433,000 439,000  586,000 534,000 523,000  787,000 688,000 727,000  1,339,000 2,098,000 2,050,000  354,000 390,000 305,000                     
        total current assets
      95,900,000 88,189,000 84,052,000 88,778,000 91,699,000 88,521,000 92,919,000 97,848,000 92,349,000 91,765,000 96,213,000 89,030,000 76,581,000 65,535,000 59,329,000 60,007,000 55,274,000 56,077,000 21,699,000 19,184,000 16,369,000 14,368,000 15,970,000 17,651,000 18,485,000 20,867,000 18,293,000 20,034,000 24,220,000 28,541,000 28,448,000 29,456,000 30,443,000 29,741,000 30,364,000 29,378,000 11,196,000 13,042,000 10,452,000 8,748,000 8,748,000 12,094,000 12,279,000 14,004,000 14,295,000 10,153,000 11,342,000 10,828,000 11,673,000 11,554,000 11,299,000 11,120,000 10,522,000 8,878,000 10,925,000 11,495,000 10,928,000 9,697,000 11,024,000 
        property and equipment
      9,277,000 8,987,000 9,001,000 8,969,000 7,028,000 4,306,000 3,503,000 3,253,000 3,150,000 3,185,000 3,083,000 2,759,000 1,281,000 1,263,000 1,322,000 1,203,000 776,000 661,000 676,000 677,000 617,000 683,000 622,000 663,000 783,000 860,000 1,000,000 1,045,000 975,000 1,074,000 1,174,000 1,203,000 1,205,000 1,166,000 1,140,000 1,419,000 861,000 793,000 789,000 1,204,000 1,204,000 1,251,000 576,000 465,000 478,000 502,000 538,000 492,000 474,000 311,000 249,000 246,000 301,000 378,000 358,000 439,000 510,000 587,000 707,000 
        goodwill
      10,719,000 10,719,000 10,719,000 10,719,000 10,742,000 10,742,000 10,353,000                                                     
        intangible assets
      9,847,000 10,143,000 10,439,000 10,781,000 11,147,000 11,512,000 11,854,000                                                     
        deferred tax assets
      21,883,000 21,076,000 19,875,000 19,114,000 18,789,000 18,585,000 18,351,000 20,773,000                                                    
        operating lease right-of-use assets
      9,089,000 9,272,000 9,422,000 9,601,000 5,749,000 6,038,000 6,325,000 5,734,000 5,863,000 5,987,000 5,951,000 6,123,000 6,293,000 561,000 740,000 917,000 1,091,000 1,265,000 1,437,000 1,606,000 1,763,000 1,918,000 1,952,000 2,107,000 2,260,000 2,387,000 2,533,000                                 
        other non-current assets
      331,000 348,000 584,000 546,000 453,000 2,576,000 2,557,000 304,000 234,000 238,000 222,000                                                 
        total assets
      157,046,000 148,734,000 144,092,000 148,508,000 145,607,000 142,280,000 145,862,000 127,912,000 101,596,000 101,175,000 105,469,000 98,143,000 84,396,000 67,543,000 61,578,000 62,328,000 57,355,000 58,185,000 24,001,000 21,665,000 18,891,000 17,111,000 18,691,000 20,574,000 21,688,000 24,300,000 22,025,000 21,307,000 25,451,000 29,901,000 29,888,000 30,955,000 31,972,000 31,001,000 31,599,000 30,892,000 12,153,000 13,930,000 11,336,000 10,046,000 10,046,000 13,439,000 12,948,000 14,563,000 14,868,000 10,749,000 11,974,000 11,415,000 12,225,000 11,943,000 11,626,000 11,444,000 10,975,000 9,415,000 11,452,000 12,108,000 11,613,000 10,456,000 11,908,000 
        liabilities and shareholders’ equity
                                                                 
        current liabilities:
                                                                 
        accounts payable
      2,103,000 3,548,000 3,380,000 6,728,000 6,961,000 4,854,000 5,571,000 5,332,000 4,979,000 4,183,000 8,328,000 9,206,000 4,988,000 3,949,000 3,387,000 4,195,000 3,307,000 3,386,000 2,753,000 2,893,000 1,086,000 1,155,000 809,000 945,000 925,000 2,320,000 1,742,000 1,933,000 557,000 1,953,000 1,317,000 1,762,000 2,638,000 1,789,000 3,473,000 2,808,000 1,821,000 1,770,000 1,906,000 1,413,000 1,413,000 1,883,000 1,390,000 1,848,000 724,000 1,631,000 1,790,000 1,586,000 1,892,000  1,892,000 1,403,000 1,188,000 1,517,000 1,461,000 2,001,000 1,507,000 960,000 1,494,000 
        accrued expenses and other current liabilities
      4,176,000 3,729,000 6,509,000 6,020,000 7,086,000                                                       
        operating lease liabilities, short-term
      606,000 585,000 905,000 909,000 1,173,000 858,000 827,000 465,000 428,000 397,000 275,000 137,000 68,000 551,000 741,000 794,000 778,000 763,000 750,000 737,000 722,000 705,000 671,000 658,000 644,000 619,000 606,000                                 
        deferred revenue, short-term
      1,857,000 443,000 1,119,000 1,981,000 844,000 613,000 3,541,000 1,345,000 486,000 147,000 6,114,000                                           238,000      
        total current liabilities
      8,742,000 8,305,000 11,913,000 15,638,000 16,064,000 11,717,000 15,420,000 10,508,000 9,180,000 7,959,000 19,253,000 16,308,000 9,388,000 10,746,000 9,899,000 11,014,000 12,817,000 16,545,000 8,760,000 9,061,000 6,911,000 4,483,000 4,173,000 3,865,000 3,327,000 6,344,000 4,540,000 5,512,000 10,019,000 11,618,000 11,264,000 11,148,000 6,591,000 6,538,000 8,079,000 7,884,000 4,730,000 4,191,000 6,002,000 4,680,000 4,680,000 7,367,000 4,181,000 5,224,000 6,519,000 4,833,000 4,472,000 4,782,000 5,117,000 5,463,000 5,651,000 6,200,000 5,701,000 4,524,000 5,351,000 5,426,000 4,855,000 3,082,000 3,318,000 
        operating lease liabilities, long-term
      9,419,000 9,578,000 9,710,000 9,921,000 5,267,000 5,574,000 5,878,000 5,732,000 5,878,000 6,016,000 5,997,000 6,163,000 6,324,000 65,000 73,000 212,000 415,000 616,000 813,000 1,007,000 1,185,000 1,361,000 1,432,000 1,605,000 1,772,000 1,924,000 2,086,000                                 
        deferred revenue, long-term
      53,000 35,000 35,000 36,000 26,000 52,000 60,000 41,000  4,000 33,000 31,000 8,000 25,000 47,000 69,000 90,000 116,000 150,000 99,000 80,000 9,000 19,000 22,000 34,000 64,000 113,000 189,000 240,000 252,000 359,000 459,000 497,000 251,000 97,000 104,000 32,000 47,000 63,000 127,000 127,000 127,000 127,000 127,000      8,000 20,000 36,000 68,000 122,000      
        other long-term liabilities
      40,000 40,000 40,000 42,000 40,000 1,756,000 2,021,000 38,000 41,000 42,000 41,000 41,000 42,000  41,000 44,000 45,000  46,000 49,000 43,000                                       
        total liabilities
      18,254,000 17,958,000 21,698,000 25,637,000 21,397,000 19,099,000 23,379,000 16,319,000 15,099,000 14,021,000 25,324,000 22,543,000 15,762,000 10,876,000 10,060,000 11,339,000 13,367,000 17,323,000 9,769,000 10,216,000 8,406,000 6,319,000 6,370,000 6,518,000 5,133,000 8,332,000 6,739,000 5,854,000 10,410,000 12,017,000 11,768,000 11,670,000 13,198,000 12,899,000 14,286,000 14,098,000 10,857,000 10,289,000 12,071,000 10,769,000 10,769,000 11,411,000 8,181,000 9,179,000 10,318,000 4,841,000 4,480,000 4,790,000 5,196,000 5,580,000 5,803,000 6,392,000 5,981,000 4,883,000 5,607,000 5,699,000 5,159,000 3,406,000 3,655,000 
        commitments and contingencies
                                                                 
        shareholders’ equity:
                                                                 
        preferred stock, 0.01 par value: authorized: 10,000 shares;
                                                                 
        issued and outstanding: none
                                                                 
        common stock
         299,000        285,000 283,000 277,000 274,000 271,000 269,000 268,000 245,000 237,000 236,000 235,000 233,000 231,000 230,000   227,000 226,000 224,000 222,000 221,000   215,000 213,000        130,000                
        issued and outstanding: 30,954 shares and 29,877 shares at february 27, 2026 and may 30, 2025, respectively
      310,000                                                           
        additional paid-in capital
      170,143,000 158,954,000 147,333,000 145,758,000        127,776,000 126,930,000 119,094,000 117,668,000  116,507,000 115,602,000 89,668,000 87,553,000 87,174,000 86,786,000 86,356,000 85,898,000 85,530,000 85,194,000 84,760,000 84,499,000 84,176,000 83,830,000 83,405,000 83,041,000 82,671,000 82,304,000 81,576,000 81,128,000 64,939,000 64,636,000 58,784,000 58,052,000 58,052,000 57,770,000 57,557,000 57,068,000 56,547,000 55,976,000 55,725,000 52,678,000 52,142,000 51,703,000 51,390,000 50,781,000 50,580,000 49,251,000 49,093,000 48,857,000 48,622,000 48,378,000 48,196,000 
        accumulated other comprehensive loss
      -84,000 -110,000 -95,000 -126,000 -181,000 -191,000 -134,000 -158,000 -144,000 -134,000 -141,000 -155,000 -162,000 -155,000 -150,000  -131,000                                           
        accumulated deficit
      -31,577,000 -28,374,000 -25,144,000 -23,060,000 -20,161,000 -19,518,000 -18,490,000 -19,150,000 -43,014,000 -41,543,000 -47,632,000 -52,306,000 -58,417,000 -62,549,000 -66,274,000 -66,863,000 -72,657,000 -74,900,000 -75,617,000 -76,313,000 -76,880,000 -76,167,000 -74,201,000 -74,286,000 -71,401,000 -71,646,000 -71,897,000 -71,484,000 -71,594,000 -68,393,000 -67,764,000 -66,249,000 -66,440,000 -66,707,000 -66,767,000 -66,777,000 -65,982,000 -63,331,000 -61,879,000 -61,124,000 -61,124,000 -58,068,000 -55,093,000 -54,045,000 -54,339,000 -52,439,000 -50,713,000 -48,599,000 -47,692,000 -47,931,000 -48,143,000 -48,280,000 -48,114,000 -47,261,000 -45,802,000 -44,991,000 -44,717,000 -43,938,000 -42,577,000 
        total shareholders' equity
      138,792,000 130,776,000 122,394,000 122,871,000 124,210,000 123,181,000 122,483,000 111,593,000 86,497,000 87,154,000 80,145,000 75,600,000 68,634,000  51,518,000 50,989,000 43,988,000  14,232,000 11,449,000 10,485,000 10,792,000 12,321,000 14,056,000 16,555,000 15,968,000 15,286,000 15,453,000 15,041,000 17,884,000 18,120,000 19,285,000 18,774,000 18,102,000 17,313,000 16,794,000 1,296,000 3,641,000  -723,000 -723,000 2,028,000 4,767,000 5,384,000 4,550,000 5,908,000 7,494,000 6,625,000 7,029,000 6,363,000 5,823,000 5,052,000 4,994,000 4,532,000 5,845,000 6,409,000 6,454,000 7,050,000 8,253,000 
        total liabilities and shareholders’ equity
      157,046,000 148,734,000   145,607,000  145,862,000 127,912,000 101,596,000 101,175,000 105,469,000   67,543,000    58,185,000                                          
        issued and outstanding: 30,624 shares and 29,877 shares at november 28, 2025 and may 30, 2025, respectively
       306,000                                                          
        liabilities and shareholders equity
                                                                 
        shareholders equity:
                                                                 
        issued and outstanding: 29,973 shares and 29,877 shares at august 29, 2025 and may 30, 2025, respectively
        300,000                                                         
        total liabilities and shareholders equity
        144,092,000 148,508,000  142,280,000                                                      
        preferred stock, 0.01 par value: authorized: 10,000 shares; issued and outstanding: none
                                                                 
        issued and outstanding: 29,770 shares and 28,995 shares at february 28, 2025 and may 31, 2024, respectively
          298,000                                                       
        additional paid-in-capital
          144,254,000 142,593,000 140,812,000 130,612,000 129,366,000 128,543,000 127,630,000                                                 
        accrued expenses
           5,392,000 5,481,000 3,366,000 3,287,000 3,232,000 4,536,000 4,143,000 3,489,000 2,566,000 2,479,000 3,610,000 2,535,000 2,254,000 1,978,000 2,163,000 1,624,000 1,344,000 1,373,000 1,439,000 1,373,000 1,596,000 1,577,000 2,034,000 2,085,000 1,487,000 1,498,000 1,646,000 1,643,000 1,607,000 1,572,000 1,609,000 1,897,000 1,366,000 1,372,000 1,553,000 1,553,000 1,458,000 1,496,000 1,557,000 1,045,000 1,375,000 1,248,000 1,435,000 1,390,000 1,447,000 1,245,000 1,437,000 1,440,000 1,554,000 1,611,000 1,580,000 1,385,000 1,221,000 1,553,000 
        issued and outstanding: 29,709 shares and 28,995 shares at november 29, 2024 and may 31, 2024, respectively
           297,000                                                      
        issued and outstanding: 29,584 shares and 28,995 shares at at august 30, 2024 and may 31, 2024, respectively
            295,000                                                     
        short-term investments
                 17,853,000 25,577,000 17,710,000                   5,986,000 5,969,000                          
        issued and outstanding: 28,995 shares and 28,539 shares at may 31, 2024 and 2023, respectively
             289,000                                                    
        issued and outstanding: 28,906 shares and 28,539 shares at february 29, 2024 and may 31, 2023, respectively
              289,000                                                   
        issued and outstanding: 28,826 shares and 28,539 shares at november 30, 2023 and may 31, 2023, respectively
               288,000                                                  
        issued and outstanding: 28,763 shares and 28,539 shares at august 31, 2023 and may 31, 2023, respectively
                288,000                                                 
        other assets
                 231,000 241,000 184,000 187,000 201,000 214,000 182,000 189,000 198,000 142,000 142,000 147,000 153,000 160,000 186,000 199,000 228,000 256,000 286,000 266,000 296,000 324,000 94,000 95,000 95,000 96,000 95,000 95,000 94,000 94,000 94,000 93,000 94,000 95,000 94,000 94,000 95,000 78,000 78,000 78,000 78,000 152,000 159,000 169,000 174,000 175,000 172,000 177,000 
        liabilities and shareholders' equity
                                                                 
        customer deposits and deferred revenue, short-term
                 2,822,000 843,000 3,680,000 3,292,000 2,415,000 6,197,000 10,142,000 3,279,000 189,000 587,000 66,000 387,000 170,000 385,000 1,809,000 615,000 1,545,000 1,267,000 2,068,000 2,339,000 1,630,000 2,310,000 3,142,000 3,034,000  1,012,000 1,055,000 2,724,000   2,026,000 1,295,000 1,819,000   792,000 761,000 1,058,000 1,345,000 2,038,000 2,413,000 1,972,000       
        shareholders' equity:
                                                                 
        total liabilities and shareholders' equity
                 98,143,000 84,396,000  61,578,000 62,328,000 57,355,000  24,001,000 21,665,000 18,891,000 17,111,000 18,691,000 20,574,000 21,688,000 24,300,000 22,025,000 21,307,000 25,451,000 29,901,000 29,888,000 30,955,000 31,972,000 31,001,000 31,599,000 30,892,000 12,153,000 13,930,000  10,046,000 10,046,000 13,439,000 12,948,000 14,563,000 14,868,000 10,749,000 11,974,000 11,415,000 12,225,000 11,943,000 11,626,000 11,444,000 10,975,000 9,415,000 11,452,000 12,108,000 11,613,000 10,456,000 11,908,000 
        other liabilities
                   40,000    46,000                                          
        total shareholders’ equity
                   56,667,000    40,862,000                                          
        aehr test systems shareholders' equity:
                                                                 
        prepaid expenses and other
                     613,000    551,000    512,000    686,000    703,000    961,000    254,000 254,000 297,000 402,000 465,000 262,000 428,000 359,000 351,000 326,000 399,000 420,000 456,000 197,000 205,000 390,000 326,000 197,000 247,000 218,000 
        line of credit
                         1,400,000 1,400,000                     2,000,000    115,000 642,000 1,000,000 777,000 406,000 476,000 947,000 1,101,000 1,215,000 1,685,000 1,452,000 1,408,000 716,000  
        current portion of long-term debt
                         1,679,000 1,492,000 1,213,000 933,000 653,000     6,110,000 6,110,000 6,110,000 6,110,000                            
        additional paid-in capital common stock
                     117,686,000                                            
        accumulated other comprehensive income
                     -105,000  -108,000 -64,000 -28,000 -45,000 -62,000 -67,000 2,234,000 2,216,000 2,211,000 2,216,000 2,230,000 2,252,000 2,241,000 2,276,000 2,292,000 2,344,000 2,306,000 2,308,000 2,249,000 2,190,000 2,188,000 2,245,000 2,237,000 2,237,000 2,213,000 2,189,000 2,249,000 2,231,000 2,262,000 2,373,000 2,451,000 2,488,000 2,502,000 2,488,000 2,465,000 2,442,000 2,469,000 2,482,000 2,473,000 2,458,000 2,519,000 2,543,000 
        aehr test systems shareholders’ equity:
                                                                 
        long-term debt
                          187,000 466,000 746,000 1,026,000         6,110,000 6,110,000   6,095,000 6,051,000 6,006,000   3,917,000 3,873,000 3,828,000 3,791,000               
        total aehr test systems shareholders' equity
                         11,449,000 10,485,000 10,792,000 12,321,000 14,077,000 16,575,000 15,988,000 15,306,000 15,472,000 15,060,000 17,902,000 18,139,000 19,305,000 18,794,000 18,121,000 17,332,000 16,813,000 1,315,000 3,660,000  -703,000 -703,000 2,047,000 4,785,000 5,402,000 4,568,000 5,926,000 7,512,000 6,645,000 7,050,000 6,384,000 5,844,000 5,073,000 5,014,000 4,553,000 5,867,000 6,431,000    
        noncontrolling interest
                             -21,000 -20,000 -20,000 -20,000 -19,000 -19,000 -18,000 -19,000 -20,000 -20,000 -19,000 -19,000 -19,000 -19,000 -19,000 -21,000 -20,000 -20,000 -19,000 -18,000 -18,000 -18,000 -18,000 -18,000 -20,000  -21,000 -21,000 -21,000 -20,000 -21,000 -22,000 -22,000    
        deferred rent
                                 153,000 151,000 147,000 145,000 63,000                            
        aehr test systems shareholders' equity: preferred stock, 0.01 par value: authorized: 10,000 shares; issued and outstanding: none
                                                                 
        issued and outstanding: 22,914 shares and 22,669 shares at november 30, 2019 and may 31, 2019, respectively
                               229,000                                  
        issued and outstanding: 22,721 shares and 22,669 shares at august 31, 2019 and may 31, 2019, respectively
                                227,000                                 
        convertible notes
                                        6,110,000                         
        authorized: 75,000 shares; issued and outstanding: 21,943 shares and 21,340 shares at february 28, 2018 and may 31, 2017, respectively
                                      219,000                           
        authorized: 75,000 shares; issued and outstanding: 21,797 shares and 21,340 shares at november 30, 2017 and may 31, 2017, respectively
                                       218,000                          
        customer deposits and deferred revenue
                                         3,467,000    1,714,000 1,714,000    4,750,000 1,712,000              
        convertible notes, net of debt issuance costs
                                         6,110,000    5,962,000 5,962,000                   
        aehr test systems shareholders' equity
                                                                 
        authorized: 75,000 shares; issued and outstanding: 16,754 shares and 13,216 shares at february 28, 2017 and may 31, 2016, respectively
                                          168,000                       
        authorized: 75,000 shares; issued and outstanding: 16,639 shares and 13,216 shares at november 30, 2016 and may 31, 2016, respectively
                                           167,000                      
        liabilities and shareholders' deficit
                                                                 
        aehr test systems shareholders' deficit:
                                                                 
        issued and outstanding: 13,589 shares and 13,216 shares at august 31, 2016 and may 31, 2016, respectively
                                            136,000                     
        total aehr test systems shareholders' deficit
                                            -714,000                     
        total shareholders' deficit
                                            -735,000                     
        total liabilities and shareholders' deficit
                                            11,336,000                     
        income taxes payable
                                                  8,000 8,000 8,000 8,000            
        preferred stock, 0.01 par value:
                                                                 
        authorized: 10,000 shares;
                                                                 
        authorized: 75,000 shares;
                                                                 
        issued and outstanding: 13,216 shares and 12,857
                                                                 
        shares at may 31, 2016 and 2015, respectively
                                             132,000 132,000                   
        authorized: 75,000 shares; issued and outstanding: 13,164 shares and 12,857 shares at february 29, 2016 and may 31, 2015, respectively
                                               132,000                  
        authorized: 75,000 shares; issued and outstanding: 13,164 shares and 12,857 shares at november 30, 2015 and may 31, 2015, respectively
                                                132,000                 
        deferred rent, net of current portion
                                                      8,000           
        issued and outstanding: 12,857 shares and 11,203 shares at may 31, 2015 and 2014, respectively
                                                  129,000               
        issued and outstanding: 12,695 shares and 11,203 shares at february 28, 2015 and may 31, 2014, respectively
                                                   127,000              
        authorized: 75,000 shares; issued and outstanding: 12,667 shares and
                                                                 
        11,203 shares at november 30, 2014 and
                                                                 
        may 31, 2014, respectively
                                                    127,000 115,000            
        issued and outstanding: 11,498 shares and
                                                                 
        11,203 shares at august 31, 2014 and
                                                                 
        income tax payable
                                                      71,000 77,000 76,000 76,000 109,000 115,000 114,000 112,000 125,000 129,000 128,000 
        issued and outstanding: 11,203 shares and 10,599 shares at may 31, 2014 and 2013, respectively
                                                      112,000           
        noncontrolling interest.
                                                      -21,000           
        acounts payable
                                                       2,265,000          
        deferred lease commitment
                                                       32,000 56,000 80,000  122,000 142,000 161,000 179,000 195,000 209,000 
        issued and outstanding: 11,018 shares and 10,599 shares at february 28, 2014 and
                                                                 
        may 31, 2013, respectively
                                                       110,000          
        issued and outstanding: 10,934 shares and 10,599 shares at november 30, 2013 and may 31, 2013, respectively
                                                        109,000         
        issued and outstanding: 10,668 shares and 10,599 shares at august 31, 2013 and may 31, 2013, respectively
                                                         107,000        
        deferred lease commitment, net of current portion
                                                          103,000       
        issued and outstanding: 10,599 shares and 9,135
                                                                 
        shares at may 31, 2013 and 2012, respectively
                                                          106,000       
        issued and outstanding: 9,363 shares and 9,135 shares at february 28, 2013 and may 31, 2012, respectively
                                                           94,000      
        doubtful accounts of 44 and 39 at
                                                                 
        november 30, 2012 and may 31, 2012, respectively
                                                            2,899,000     
        deferred revenue
                                                            594,000 393,000 555,000 185,000 271,000 
        issued and outstanding: 9,363 shares and
                                                                 
        9,135 shares at november 30, 2012 and
                                                                 
        may 31, 2012, respectively
                                                            94,000 92,000    
        doubtful accounts of 38 and 39 at
                                                                 
        august 31, 2012 and may 31, 2012, respectively
                                                             2,558,000    
        issued and outstanding: 9,236 shares and
                                                                 
        9,135 shares at august 31, 2012 and
                                                                 
        issued and outstanding: 9,135 shares and 8,932
                                                                 
        shares at may 31, 2012 and 2011, respectively
                                                              91,000   
        doubtful accounts of 14 and 23 at
                                                                 
        february 29, 2012 and may 31, 2011,
                                                                 
        respectively
                                                               825,000 2,101,000 
        issued and outstanding: 9,055 shares and
                                                                 
        8,932 shares at february 29, 2012 and
                                                                 
        may 31, 2011, respectively
                                                               91,000 91,000 
        doubtful accounts of 32 and 23 at
                                                                 
        november 30, 2011 and may 31, 2011,
                                                                 
        8,932 shares at november 30, 2011 and
                                                                 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-02-27 2025-11-28 2025-08-29 2025-05-30 2025-02-28 2024-11-29 2024-08-30 2024-05-31 2024-02-29 2023-11-30 2023-08-31 2023-05-31 2023-02-28 2022-11-30 2022-08-31 2022-05-31 2022-02-28 2021-11-30 2021-08-31 2021-05-31 2021-02-28 2020-11-30 2020-08-31 2020-05-31 2020-02-29 2019-11-30 2019-08-31 2019-05-31 2019-02-28 2018-11-30 2018-08-31 2018-05-31 2018-02-28 2017-11-30 2017-08-31 2017-05-31 2017-02-28 2016-11-30 2016-08-31 2016-05-30 2016-02-29 2015-11-30 2015-08-31 2015-05-31 2015-02-28 2014-11-30 2014-08-31 2014-05-31 2014-02-28 2013-11-30 2013-08-31 2013-05-31 2013-02-28 2012-11-30 2012-08-31 2012-05-31 2012-02-29 
                                                                 
          cash flows from operating activities:
                                                                 
          net loss
        -3,203,000                         251,000 -413,000         -795,000 -2,651,000    -2,975,000     -2,114,000 -907,000   137,000 -166,000 -854,000 -1,458,000   -779,000 -1,361,000 
          adjustments to reconcile net loss to net cash from operating activities:
                                                                 
          stock-based compensation expense
        1,384,000 1,841,000 1,671,000 1,421,000 1,796,000 1,075,000 870,000 774,000 584,000 638,000 522,000  592,000 793,000 710,000  880,000 718,000 588,000 303,000 271,000   299,000 207,000 205,000 199,000 200,000 225,000 224,000 256,000 174,000 242,000 364,000 216,000 208,000 257,000 215,000 319,000 230,000 213,000 254,000 319,000 304,000 219,000 277,000 197,000 204,000 235,000 247,000 143,000 174,000 201,000     
          depreciation and amortization
        677,000 690,000 743,000 739,000 620,000 606,000 347,000 188,000 186,000 145,000 138,000 113,000 146,000 102,000 89,000 81,000 77,000 76,000 73,000 71,000 74,000 83,000 82,000 86,000 105,000 98,000 95,000 98,000 103,000 119,000 111,000 117,000 110,000 101,000 89,000 76,000 66,000 61,000 68,000 80,000 50,000 36,000 37,000 37,000 37,000 32,000 29,000 22,000 24,000 42,000 53,000 75,000 77,000 84,000 86,000 103,000 120,000 
          deferred income taxes
        -807,000 -1,201,000 -761,000 -128,000 -203,000 -234,000 144,000                                                   
          amortization of operating lease right-of-use assets
        183,000 181,000 179,000 281,000 289,000 287,000 219,000 184,000 185,000                                                 
          changes in operating assets and liabilities:
                                                                 
          accounts receivable
        -1,504,000 2,751,000 1,140,000 -2,075,000 -4,680,000 1,163,000 2,555,000 -4,340,000 -907,000 8,600,000 3,437,000    7,648,000 -4,380,000 -1,170,000 -3,179,000 895,000 -2,436,000 -1,278,000 -301,000 2,642,000 -199,000 1,732,000 -1,956,000 1,584,000 -2,914,000 1,939,000 -1,631,000 563,000 1,787,000 -1,119,000 1,852,000 -1,260,000 -2,388,000 -147,000 278,000 -1,250,000 1,479,000 604,000 61,000 -1,257,000 -810,000 639,000 673,000 1,272,000 -35,000 -627,000 158,000 -216,000 -1,157,000 1,248,000 -350,000 53,000 -1,820,000 1,196,000 
          inventories
        857,000 -872,000 218,000 -230,000 1,427,000 -758,000 -2,880,000 450,000 -4,186,000 -2,292,000 -7,704,000 -2,686,000 -3,689,000 -771,000 -2,323,000 -1,225,000 -1,237,000 -2,888,000 -1,324,000 -623,000 718,000 -955,000 -112,000 1,321,000 470,000 -471,000 -156,000 9,000 814,000 -399,000 -536,000 319,000 -1,143,000 795,000 -2,044,000 233,000 -1,138,000 -39,000 1,374,000 345,000 41,000 -160,000 -156,000 -302,000 -825,000 275,000 -156,000 -194,000 -265,000   327,000 679,000 336,000 -640,000 -420,000 -72,000 
          prepaid expenses and other assets
                    29,000    32,000    -137,000    -24,000                                 
          accounts payable
        -1,362,000 287,000 -2,401,000 -853,000 2,019,000 -1,252,000 -628,000 341,000 867,000 -4,160,000 -939,000 4,222,000 1,032,000 559,000 -769,000 912,000 -68,000 642,000 -130,000 1,799,000 -82,000 333,000 -173,000 9,000 -1,422,000 624,000 -235,000 1,342,000 -1,434,000 700,000 -398,000 -827,000 737,000 -1,656,000 651,000 960,000 5,000 8,000 713,000 -504,000 381,000 -426,000 1,113,000 -856,000 -119,000 395,000 -270,000 -368,000 364,000 536,000 175,000 -136,000 325,000 -431,000 485,000 464,000 -377,000 
          accrued expenses
        445,000 -988,000 505,000 137,000 -520,000 -283,000 288,000 82,000 100,000 -1,329,000 355,000 654,000 919,000 85,000 -1,130,000 1,089,000 271,000 273,000 -169,000 553,000 276,000 -30,000 -67,000 85,000 -236,000 17,000 -455,000 -29,000 606,000 -24,000 -151,000 31,000 26,000 26,000 -21,000 -272,000 526,000 -20,000 -181,000 105,000 -5,000 -66,000 505,000 -300,000 88,000 -197,000 38,000 -33,000 191,000 -190,000 7,000       
          deferred revenue
        1,431,000 -676,000 -863,000 1,147,000 205,000 -2,936,000 1,727,000 899,000 335,000 -5,997,000 3,294,000                                               
          operating lease liabilities
        -139,000 -482,000 -215,000 -229,000 8,000 -273,000 -205,000 -166,000 -168,000 -61,000 -28,000                                               
          income taxes payable
        -4,000 10,000 -16,000 -32,000 -19,000 2,000 -4,000 6,000 -8,000 20,000 -1,000 5,000 2,000 2,000 -12,000 7,000 8,000 3,000 -13,000 2,000 1,000 -21,000 15,000 1,000 3,000 -20,000 -9,000 14,000 4,000 -23,000 4,000 11,000 -20,000 -21,000 2,000 23,000 -2,000 -16,000 -34,000 11,000 -2,000 -36,000 57,000 17,000 -53,000           
          net cash from operating activities
        -3,689,000 -1,171,000 -282,000 -2,302,000 -1,605,000 -5,873,000 2,380,000 1,224,000 -2,824,000 -545,000 3,901,000 5,868,000 -1,123,000 -195,000 5,461,000 -767,000 -2,936,000 3,337,000 1,874,000 -190,000 -256,000 -2,898,000 643,000 -1,384,000 -364,000 -86,000 -190,000 -844,000 -1,836,000 -1,986,000 -971,000 1,745,000 -943,000 1,724,000 -3,877,000 -27,000 -3,052,000   -1,574,000 -854,000 -1,757,000 -2,096,000 -616,000 -797,000 -625,000 -218,000  -604,000 263,000 172,000       
          capital expenditures
        -74,000 -467,000 -1,391,000 -2,818,000 -1,656,000 -321,000 -197,000 -46,000 -263,000 -156,000 -284,000 -1,184,000 -79,000 -15,000 -84,000 -198,000 -86,000 -73,000 -59,000 -22,000 -11,000 -147,000 -47,000 -12,000 -28,000 -73,000 -50,000 -49,000 -21,000 -19,000 -84,000 -114,000 -145,000 -129,000 -184,000 -258,000 -131,000   -29,000 -721,000 -148,000 -21,000 -12,000 -1,000 -84,000 -21,000  -46,000 -6,000       
          free cash flows
        -3,763,000 -1,638,000 -1,673,000 -5,120,000 -3,261,000 -6,194,000 2,183,000 1,178,000 -3,087,000 -701,000 3,617,000 4,684,000 -1,202,000 -210,000 5,377,000 -965,000 -3,022,000 3,264,000 1,815,000 -212,000 -267,000 -3,045,000 596,000 -1,396,000 -392,000 -159,000 -240,000 -893,000 -1,857,000 -2,005,000 -1,055,000 1,631,000 -1,088,000 1,595,000 -4,061,000 -285,000 -3,183,000   -1,603,000 -1,575,000 -1,905,000 -2,117,000 -628,000 -798,000 -709,000 -239,000  -604,000 217,000 166,000       
          cash flows from investing activities:
                                                                 
          purchases of property and equipment
        -74,000 -467,000 -1,391,000 -2,818,000 -1,656,000 -321,000 -197,000 -46,000 -263,000 -156,000 -284,000 -1,184,000 -79,000 -15,000 -84,000 -198,000 -86,000 -73,000 -59,000 -22,000 -11,000 -147,000 -47,000 -12,000 -28,000 -73,000 -50,000 -49,000 -21,000 -19,000 -84,000 -114,000 -145,000 -129,000 -184,000 -258,000 -131,000 -67,000 -21,000 -29,000 -721,000 -148,000 -21,000 -12,000 -1,000 -84,000 -21,000 -185,000          
          payments for business acquisition, net of cash and cash equivalents acquired
                                                                
          net cash from investing activities
        -74,000 -2,268,000 -1,391,000 -2,818,000 -2,116,000 -321,000 -10,812,000 -46,000 -263,000 -156,000 17,716,000 6,816,000 -7,721,000 -17,667,000 -84,000 -198,000 -86,000 -73,000 -59,000 -22,000 -11,000 -147,000 -47,000 -14,000 -26,000 -73,000 -50,000 -49,000 -21,000 -19,000 -84,000 5,851,000 -138,000 -6,101,000 -184,000 -258,000 -131,000 -67,000 -21,000 -29,000 -721,000 -148,000 -21,000 -12,000 -1,000 -84,000 -21,000  -52,000 -46,000 -6,000       
          cash flows from financing activities:
                                                                 
          proceeds from issuance of common stock from public offering, net of issuance costs
        10,224,000           -33,000                                            
          proceeds from issuance of common stock under employee plans
        58,000 897,000 170,000 515,000 63,000 775,000 56,000 537,000 178,000 774,000 318,000 597,000 853,000 657,000 455,000                         52,000 237,000 223,000 302,000 38,000             
          shares repurchased for tax withholdings on vesting of restricted stock units
        -454,000 -491,000 -328,000  -177,000 -181,000 -162,000 -116,000 -20,000 -448,000 -1,012,000 -380,000 -464,000 -37,000 -1,179,000                                           
          net cash from financing activities
        9,828,000 9,777,000 -158,000 251,000 -114,000 594,000 -106,000 421,000 158,000 254,000 -694,000 184,000 7,242,000 620,000 -724,000 361,000 26,000 25,239,000 135,000 77,000 1,518,000 175,000 190,000 1,749,000 130,000 231,000 62,000 -5,986,000 123,000 203,000 109,000 198,000 126,000 367,000 234,000 16,026,000 47,000 5,668,000 94,000 46,000 2,000,000 237,000 223,000 3,947,000 -489,000 2,416,000 538,000  9,000 -107,000 -95,000       
          effect of exchange rate changes on cash, cash equivalents and restricted cash
        11,000 -11,000 9,000 -12,000 28,000 -12,000 9,000 -21,000 -4,000 6,000 -22,000                                               
          net increase in cash, cash equivalents and restricted cash
        6,076,000   -4,881,000 -3,807,000 -5,612,000 -8,529,000 1,578,000 -2,933,000 -441,000 20,901,000 12,866,000 -1,616,000 -17,273,000 4,663,000   28,501,000 1,948,000    880,000                                   
          cash, cash equivalents and restricted cash, beginning of period
        26,480,000  49,309,000  30,204,000  31,564,000  4,662,000  5,513,000  5,508,000                               
          cash, cash equivalents and restricted cash, end of period
        6,076,000 6,327,000 24,658,000  -3,807,000 -5,612,000 40,780,000  -2,933,000 -441,000 51,105,000  -1,616,000 -17,273,000 36,227,000  -3,011,000 28,501,000 6,610,000    6,393,000  -244,000 36,000 5,346,000                               
          supplemental disclosure of non-cash flow information:
                                                                 
          net transfer of equipment between inventory and property and equipment
                                                                 
          prepaid expenses and other current assets
         532,000 1,576,000 -181,000 -1,891,000 -2,221,000 -719,000 -275,000 1,645,000 -2,335,000 90,000    -210,000    -201,000    80,000    194,000  -70,000 19,000 4,000  532,000 -46,000 -1,089,000   -86,000 -52,000                   
          net income
          -2,084,000 -2,899,000 -643,000 -1,028,000 660,000 23,864,000 -1,471,000 6,089,000 4,674,000 6,111,000 4,132,000 3,725,000 589,000 5,794,000 2,243,000 717,000 696,000    107,000 -2,885,000    110,000 -3,201,000 -629,000 -1,515,000 191,000 267,000 60,000 10,000    -755,000    294,000 -1,900,000    239,000       -296,000   
          adjustments to reconcile net income to net cash from operating activities:
                                                                 
          net decrease in cash, cash equivalents and restricted cash
          -1,822,000                       36,000 -162,000                               
          impairment of assets
                                                                 
          accretion of investment discount
               -130,000 -271,000 -241,000                                             
          provision for credit losses
                                                                 
          payments for business acquisition, net of cash and cash equivalent acquired
           -460,000                                                     
          proceeds from maturities of investments
               18,000,000 8,000,000                                              
          purchases of investments
                   -15,642,000                    7,000                         
          shares repurchased for tax withholdings on vesting of restricted stock units and in connection with the termination of the esop
                                                                 
          proceeds from issuance of common stock, net of issuance costs
                                                                 
          cash, cash equivalents and restricted cash, beginning of year
                                                                 
          cash, cash equivalents and restricted cash, end of year
                                                                 
          supplemental cash flow information:
                                                                 
          income taxes paid
                                                                 
          interest paid
                                                                 
          purchases of property and equipment included in accounts payable and accrued liabilities
                                                                 
          changes in operating assets and liabilities, net of acquisition:
                                                                 
          acquisition of business, net of cash acquired
              -10,615,000                                                   
          gain from forgiveness of ppp loan
                       -1,698,000                                       
          line of credit repayments
                         -1,400,000                         -115,000 -527,000             
          provision for doubtful accounts
                                        31,000  4,000 -8,000 20,000              -20,000   25,000 -17,000 
          issuance cost of common stock offering
                                                                 
          non-cash lease expenses
                  172,000                                               
          stock-based compensation
                                                                 
          non-cash operating lease expense
                   78,000                                              
          net gain from dissolution of aehr test systems japan
                           -2,186,000                                   
          income tax benefit related to dissolution of aehr test systems japan
                           -215,000                                   
          trade and other accounts receivable
                   -5,202,000 -1,204,000                                             
          prepaid expenses and other
                                               43,000 105,000 62,000 -201,000 163,000 -74,000 -9,000 -46,000 72,000 23,000 35,000 -181,000 4,000 182,000 -66,000 -127,000 48,000 -30,000 
          customer deposits and deferred revenue
                   2,002,000 -2,854,000 366,000 855,000 -3,803,000 -3,971,000 6,829,000 3,141,000 -379,000 592,000 -331,000 214,000 -227,000 -1,454,000 1,145,000 -1,006,000 227,000 -813,000 -378,000 609,000 -718,000 -586,000 262,000 -440,000 2,527,000 -58,000 -1,685,000 946,000 -312,000 731,000 -524,000 -2,804,000 3,039,000 920,000 37,000 -294,000 -293,000 -707,000 -393,000 409,000       
          other long-term liabilities
                           4,000                                      
          line of credit (repayments) borrowings
                                                        -471,000 -154,000 -114,000      
          effect of exchange rates on cash, cash equivalents and restricted cash
                   -2,000 -14,000 -31,000 10,000 68,000 -15,000 -2,000 -2,000  38,000 6,000 94,000                                   
          cash paid during the year for:
                                                                 
          income taxes
                                                                 
          interest
                                                                 
          loss on disposal of property plant equipment
                                                                 
          proceeds from long-term debt
                                                                 
          proceeds from issuance of common stock under employee plans, net of taxes paid related to share settlement of equity awards
                        26,000 1,209,000 1,535,000  118,000 175,000 190,000  130,000 231,000 62,000   203,000 109,000  126,000    47,000                     
          net increase in cash, cash equivalent and restricted cash
                                                                 
          recovery of doubtful accounts
                                                                
          loss on disposal of assets
                                                          9,000       
          deferred rent
                                   2,000 4,000 2,000 82,000             -8,000           
          repayment of convertible notes
                                                                 
          line of credit borrowings
                                                            233,000 44,000 692,000  
          effect of exchange rates on cash, cash equivalents and restricted cash
                                                                 
          gain on disposal of fixed asset
                                                                 
          proceeds from sales of property and equipment
                                                                
          net decrease in cash, cash equivalent and restricted cash
                                                                 
          adjustments to reconcile net loss to net cash used in operating activities:
                                                                 
          cash, cash equivalents and restricted cash,  end of period
                                                                 
          transfers of property and equipment to inventories
                                         372,000    372,000                   
          adjustments to reconcile net income to net cash from operating activities:    stock-based compensation expense
                              270,000                                   
          effect of exchange rates on cash and cash equivalents
                                16,000 -36,000 16,000 7,000 32,000 -60,000 -38,000 -23,000 73,000 -24,000 17,000 23,000 21,000 -129,000 86,000                   
          (recovery of) provision for doubtful accounts
                                       -55,000 11,000           14,000 -13,000 -11,000 -20,000        -1,000   
          amortization of debt issuance costs
                                            44,000 45,000 44,000 51,000 44,000 45,000 37,000               
          proceeds from issuance of common stock under public offering, net of issuance costs
                                                                 
          proceeds from issuance of common stock under private placement, net of issuance costs
                                                              
          net increase in cash and cash equivalents
                                       7,771,000 -882,000 -4,034,000 -3,810,000 15,764,000 -3,115,000   -1,533,000 517,000 -1,698,000 -1,874,000 3,253,000   266,000   59,000 111,000       
          cash and cash equivalents, beginning of year
                                                                 
          cash and cash equivalents, end of year
                                                                 
          fair value of common stock issued to settle accounts payable
                                                                 
          adjustments to reconcile net income to net cash used in operating activities:
                                                                 
          proceeds from issuance of common stock  under employee plans, net of taxes paid related to share settlement of equity awards
                                                                 
          net decrease in cash and cash equivalents
                                    -1,702,000 -1,862,000 -984,000                           
          cash and cash equivalents, beginning of period
                                    16,848,000  17,803,000  939,000  5,527,000  1,809,000  2,324,000  2,073,000  
          cash and cash equivalents, end of period
                                    -1,702,000 -1,862,000 15,864,000  -882,000 -4,034,000 13,993,000  -3,115,000 2,812,000 2,342,000  517,000 -1,698,000 3,653,000  -1,322,000 1,521,000 2,075,000  -648,000 59,000 2,435,000  189,000 -709,000 1,901,000  -151,000 
          loss on disposal of asset
                                                                 
          line of credit borrowings (repayments)
                                                     223,000           
          proceeds from issuance of convertible notes
                                                                 
          net change in capitalized stock-based compensation
                                                                 
          line of credit converted to convertible notes
                                                                 
          adjustments to reconcile net income to net cash from operating activities:
                                                                 
          proceeds from issuance of common stock under employee plans, net of taxes paid related to share settlement of equity awards
                                          234,000                       
          fair value of common stock issued to settle accounts payable
                                              323,000                   
          provision (recovery of) for doubtful accounts
                                                                 
          amortization of debt issuance cost
                                                                 
          net cash from operating activities
                                              1,244,000                   
          proceeds from issuance of common stock under employee plans, net of taxes paid related to share settlement of equity awards
                                              94,000                   
          net increase in cash and  cash equivalents
                                              1,403,000                   
          net change in capitalized share-based compensation
                                                  -20,000  -7,000        -42,000     
          (recovery of) benefit from doubtful accounts
                                                                 
          gain on disposal of asset
                                                                 
          proceeds from issuance of common stock under private placement, net of issuance cost
                                                                 
          non-cash transactions:
                                                                 
          provision for (recovery of) doubtful accounts
                                                -9,000 -2,000 19,000        7,000       
          effect of exchange rates on cash
                                                92,000 -30,000 20,000  -35,000 -186,000 -33,000  -1,000 -51,000 40,000  -162,000 -93,000 5,000  -78,000 
          proceed from issuance of long-term debt
                                                                 
          net increase in cash andcash equivalents
                                                                 
          proceeds from issuance of common stock and exercise of stock options
                                                      315,000  79,000 364,000 59,000       
          adjustments to reconcile net income to net cash
                                                                 
          used in operating activities:
                                                                 
          gain on sale of long-term investment
                                                               
          income tax payable
                                                       -30,000 12,000 -2,000 -45,000 -20,000 1,000 13,000 1,000 -34,000 11,000 
          net cash from
                                                                 
          operating activities
                                                             -957,000 -272,000 -1,669,000 -787,000 
          proceeds from sales of investments
                                                                 
          investing activities.
                                                                 
          proceeds from issuance of common stock
                                                                 
          under private placement
                                                                 
          under employee plans
                                                                 
          financing activities
                                                             346,000 111,000 746,000 716,000 
          effect of exchange rates on cash and
                                                                 
          cash equivalents
                                                             -709,000 -172,000 1,067,000 -151,000 
          net increase in cash and
                                                                 
          non cash transactions:
                                                                 
          deferred lease commitment
                                                        -24,000 -24,000 -23,000 -19,000    -16,000 -14,000 
          purchase of property and equipment
                                                         -46,000 -6,000 -1,000 -105,000 -5,000 -16,000 -25,000 -2,000 
          adjustments to reconcile net loss to net cash
                                                                 
          proceeds from sale of investments
                                                               
          investing activities
                                                             -5,000 -16,000 -25,000 -2,000 
          accrued expenses and deferred revenue
                                                            -289,000 224,000 16,000 569,000 -425,000 
          deferred lease commitment, net of current
                                                             -19,000 -18,000   
          and exercise of stock options
                                                             113,000 67,000 54,000 
          net decrease in cash and
                                                                 
          adjustments to reconcile net income to
                                                                 
          net cash from operating
                                                                 
          activities:
                                                                 
          stock based compensation expense
                                                              169,000   
          from operating activities:
                                                                 
          adjustments to reconcile net loss to
                                                                 
          stock compensation expense
                                                                182,000