7Baggers

RxSight, Inc
(NASDAQ:RXST) 

RXST stock logo

RxSight, Inc., a medical technology company, develops light adjustable lens (LAL) to improve uncorrected visual acuity that can be adjusted enhance uncorrected visual acuity after cataract surgery. It also offers RxSight light delivery device, an office-based light treatment device that delivers UV ...

Founded: 1997
Sector: Healthcare
Industry: Medical Devices

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At a glance:
Bull Thesis:
Bear Thesis:
Main Competitors:
Moat:
Income Statements:
Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 
                        
      sales
    30,893,000 32,608,000 30,340,000 33,637,000 37,895,000 40,214,000 35,314,000 34,887,000 29,512,000 28,580,000 22,199,000 20,810,000 17,489,000 16,088,000 12,615,000 11,360,000 8,942,000 8,426,000 5,786,000 4,897,000 
      cost of sales
    7,395,000 7,345,000 6,113,000 8,447,000 9,566,000 11,426,000 10,094,000 10,637,000 8,827,000 10,926,000 8,468,000 8,795,000 7,123,000 8,666,000 7,259,000 6,572,000 5,181,000 5,557,000 4,445,000 5,709,000 
      gross profit
    23,498,000 25,263,000 24,227,000 25,190,000 28,329,000 28,788,000 25,220,000 24,250,000 20,685,000 17,654,000 13,731,000 12,015,000 10,366,000 7,422,000 5,356,000 4,788,000 3,761,000 2,869,000 1,341,000 -812,000 
      yoy
    -17.05% -12.24% -3.94% 3.88% 36.95% 63.07% 83.67% 101.83% 99.55% 137.86% 156.37% 150.94% 175.62% 158.70% 299.40% -689.66%     
      qoq
    -6.99% 4.28% -3.82% -11.08% -1.59% 14.15% 4.00% 17.23% 17.17% 28.57% 14.28% 15.91% 39.67% 38.57% 11.86% 27.31% 31.09% 113.94% -265.15%  
      operating expenses:
                        
      selling, general and administrative
    31,855,000 27,695,000 27,345,000 28,976,000 28,636,000 28,209,000 25,608,000 24,292,000 23,324,000 21,165,000 19,142,000 18,239,000 16,255,000 15,731,000 14,926,000 14,388,000 13,620,000 11,616,000 9,076,000 6,502,000 
      research and development
    9,472,000 8,905,000 9,060,000 10,217,000 10,367,000 9,207,000 8,838,000 8,291,000 8,031,000 7,341,000 7,101,000 7,401,000 7,208,000 6,681,000 6,388,000 6,192,000 6,719,000 5,916,000 5,377,000 6,563,000 
      total operating expenses
    41,327,000 36,600,000 36,405,000 39,193,000 39,003,000 37,416,000 34,446,000 32,583,000 31,355,000 28,506,000 26,243,000 25,640,000 23,463,000 22,412,000 21,314,000 20,580,000 20,339,000 17,532,000 14,453,000 13,065,000 
      income from operations
    -17,829,000 -11,337,000 -12,178,000 -14,003,000 -10,674,000 -8,628,000 -9,226,000 -8,333,000 -10,670,000 -10,852,000 -12,512,000 -13,625,000 -13,097,000 -14,990,000 -15,958,000 -15,792,000 -16,578,000 -14,663,000 -13,112,000 -13,877,000 
      yoy
    67.03% 31.40% 32.00% 68.04% 0.04% -20.49% -26.26% -38.84% -18.53% -27.61% -21.59% -13.72% -21.00% 2.23% 21.71% 13.80%     
      qoq
    57.26% -6.91% -13.03% 31.19% 23.71% -6.48% 10.72% -21.90% -1.68% -13.27% -8.17% 4.03% -12.63% -6.07% 1.05% -4.74% 13.06% 11.83% -5.51%  
      other income, net:
                        
      interest expense
    -3,000 -5,000 -4,000 -5,000 -6,000 -5,000 -5,000 -6,000 -6,000 -4,000 -230,000 -1,568,000 -1,507,000 -1,451,000 -1,299,000 -1,136,000 -1,060,000 -1,079,000 -1,079,000 -826,000 
      interest and other income
    1,954,000 2,195,000 2,376,000 2,254,000 2,508,000 2,707,000 2,906,000 2,276,000 1,585,000 1,661,000 1,746,000 1,777,000 1,392,000 836,000 439,000 196,000 46,000 10,000 11,000 15,000 
      income before income taxes
    -15,878,000 -9,147,000 -9,806,000 -11,754,000 -8,172,000 -5,926,000 -6,325,000 -6,063,000 -9,091,000 -9,195,000 -12,403,000 -13,778,000 -13,212,000 -15,605,000 -16,818,000 -16,732,000 -17,592,000 -15,732,000 -12,677,000 -13,474,000 
      income tax expense
    6,000 5,000 10,000 32,000 18,000 12,000 13,000 16,000 9,000 -18,000 12,000 26,000  5,000   4,000 2,000 -4,000 3,000 
      net income
    -15,884,000 -9,152,000 -9,816,000 -11,786,000 -8,190,000 -5,938,000 -6,338,000 -6,079,000 -9,100,000 -9,177,000 -12,415,000 -13,804,000 -13,212,000 -15,610,000 -16,818,000 -16,732,000 -17,596,000 -15,734,000 -12,673,000 -13,477,000 
      yoy
    93.94% 54.13% 54.88% 93.88% -10.00% -35.29% -48.95% -55.96% -31.12% -41.21% -26.18% -17.50% -24.91% -0.79% 32.71% 24.15%     
      qoq
    73.56% -6.76% -16.71% 43.91% 37.93% -6.31% 4.26% -33.20% -0.84% -26.08% -10.06% 4.48% -15.36% -7.18% 0.51% -4.91% 11.83% 24.15% -5.97%  
      other comprehensive loss
                        
      unrealized loss on short-term investments
    -120,000   -146,000 -157,000             -5,000 -5,000  
      foreign currency translation gain
     5,000 -1,000 14,000 6,000 -11,000 6,000 -1,000 -3,000   1,000 2,000   -9,000    1,000 
      total other comprehensive loss
    -120,000 -26,250 177,000 -132,000 -151,000           -85,000  -9,000 -8,000 -3,000 
      comprehensive loss
    -16,004,000 -9,160,000 -9,639,000 -11,918,000 -8,341,000 -6,293,000 -5,699,000 -6,144,000 -9,148,000 -9,122,000 -12,402,000 -13,868,000 -13,126,000 -15,567,000 -16,773,000 -16,817,000 -17,674,000   -13,480,000 
      net income per share
                        
      basic & diluted
    -0.38 -0.183 -0.24 -0.29 -0.2 -0.14 -0.16 -0.16 -0.25 -0.25 -0.35 -0.4 -0.42        
      weighted-average shares used for eps calculation
                        
      attributable to common stock, basic & diluted
    41,306,110 10,185,304.75 40,965,219 40,743,786 40,509,646 9,591,939.75 39,788,621 38,455,955 36,843,087 507,780 35,662,397 34,498,265 31,637,097 -0.55 -0.61      
      unrealized gain on short-term investments
     -13,000 178,000   -344,000 633,000 -64,000 -45,000 45,000 19,000 -65,000 84,000 -23,750 55,000 -76,000    -4,000 
      loss on extinguishment of term loan
              -1,407,000 -362,000         
      other comprehensive income
                        
      total other comprehensive income
         -355,000 639,000 -65,000 -48,000 55,000 13,000 -64,000 86,000 -29,500 45,000  -78,000    
      foreign currency translation
             -750 -6,000          
      change in fair value of warrants
                      1,503,000 1,214,000 
      expiration of warrant
                        
      foreign currency translation loss
                 14,000 -10,000  -4,000 -4,000 -3,000  
      attributable to series g common stock, basic and diluted
                       -0.32 
      attributable to common stock, basic
                   -0.61  0.09 -0.68 -3.28 
      attributable to common stock, diluted
                   -0.61  0.09 -0.68 -3.53 
      unrealized income on short-term investments
                    -74,000    
      attributable to common stock, basic and diluted
                    -0.64    
      accretion to redemption value of redeemable preferred stock and redeemable stock options
                        
      earnings allocated to redeemable preferred stock
                        
      net income attributable to common stockholders
                     -15,734,000 -12,673,000  
      comprehensive income
                     -8,240,500 -12,681,000  
      attributable to redeemable common stock, basic
                        
      attributable to redeemable common stock, diluted
                        
      net loss attributable to common stockholders
                       -13,477,000 
      attributable to redeemable common stock, basic and diluted
                        
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 
                          
        assets
                          
        current assets:
                          
        cash and cash equivalents
      17,573,000 19,949,000 29,633,000 40,355,000 28,000,000 16,706,000 16,720,000 24,445,000 32,645,000 9,692,000 9,859,000 8,753,000 11,012,000 11,834,000 8,912,000 24,004,000 24,132,000 24,361,000 68,278,000 41,731,000 
        short-term investments
      200,307,000 208,179,000 197,883,000 187,136,000 201,341,000 220,517,000 220,400,000 208,839,000 92,709,000 117,490,000 122,023,000 138,340,000 142,927,000 93,968,000 103,923,000 104,616,000 119,715,000 134,971,000 99,985,000 19,998,000 
        accounts receivable
      22,443,000 23,383,000 24,151,000 28,058,000 30,958,000 30,050,000 25,368,000 25,723,000 21,550,000 20,281,000 15,244,000 13,295,000 12,668,000 10,956,000 9,020,000 6,884,000 5,626,000 4,862,000 4,357,000 3,936,000 
        inventories
      34,869,000 31,559,000 28,950,000 25,061,000 23,574,000 22,009,000 21,673,000 19,443,000 18,700,000 17,421,000 18,924,000 17,945,000 18,067,000 14,835,000 15,336,000 11,622,000 8,490,000 8,032,000 9,442,000 8,543,000 
        prepaid and other current assets
      4,033,000 4,389,000 3,260,000 3,264,000 4,541,000 4,541,000 2,607,000 2,773,000 2,955,000 3,523,000 1,897,000 2,112,000 2,992,000 2,962,000 1,971,000 2,802,000 3,184,000 4,069,000 4,274,000 1,338,000 
        total current assets
      279,225,000 287,459,000 283,877,000 283,874,000 288,414,000 293,823,000 286,768,000 281,223,000 168,559,000 168,407,000 167,947,000 180,445,000 187,666,000 134,555,000 139,162,000 149,928,000 161,147,000 176,295,000 186,336,000 75,546,000 
        property and equipment
      13,232,000 13,056,000 13,096,000 13,255,000 12,557,000 12,413,000 12,241,000 12,444,000 11,617,000 10,841,000 10,262,000 10,533,000 9,804,000 10,138,000 10,620,000 11,083,000 10,915,000 11,217,000 11,991,000 12,686,000 
        operating leases right-of-use assets
      9,760,000 9,959,000 10,276,000 10,588,000 10,922,000 11,217,000 10,536,000 10,818,000 2,052,000 2,444,000 2,793,000 3,174,000 3,555,000 3,943,000 4,331,000 4,704,000 4,057,000 4,284,000 4,561,000 4,749,000 
        restricted cash
      750,000 750,000 748,000 750,000 750,000 750,000 711,000 711,000 711,000 711,000 711,000 761,000 761,000 761,000 811,000 811,000 811,000 811,000 561,000 561,000 
        other assets
      1,026,000 590,000 536,000 542,000 401,000 360,000 213,000 303,000 226,000 147,000 137,000 348,000 746,000 767,000 782,000 188,000 132,000 114,000 287,000 1,344,000 
        total assets
      303,993,000 311,814,000 308,533,000 309,009,000 313,044,000 318,563,000 310,469,000 305,499,000 183,165,000 182,550,000 181,850,000 195,261,000 202,532,000 150,164,000 155,706,000 166,714,000 177,062,000 192,721,000 203,736,000 94,886,000 
        liabilities and stockholders' equity
                          
        current liabilities:
                          
        accounts payable
      7,124,000 5,296,000 3,377,000 3,348,000 7,111,000 4,544,000 4,581,000 5,095,000 5,057,000 3,863,000 4,105,000 3,997,000 3,717,000 2,595,000 4,172,000 3,277,000 2,587,000 1,689,000 1,691,000 2,342,000 
        accrued expenses and other current liabilities
      18,748,000 19,795,000 17,621,000 15,934,000 14,575,000 20,358,000 17,323,000 13,787,000 11,657,000 15,239,000 12,861,000 10,588,000 9,181,000 12,672,000 10,248,000 7,877,000 6,409,000 7,859,000 6,016,000 4,781,000 
        lease liabilities
      1,504,000 1,162,000 1,293,000 1,101,000 1,055,000 974,000 734,000 736,000 1,614,000 1,801,000 1,976,000 1,980,000 1,978,000 1,970,000 1,948,000 1,842,000 1,663,000 1,529,000 1,469,000 1,365,000 
        total current liabilities
      27,376,000 26,253,000 22,291,000 20,383,000 22,741,000 25,876,000 22,638,000 19,618,000 18,328,000 20,903,000 18,942,000 16,565,000 14,876,000 17,237,000 16,368,000 12,996,000 10,659,000 11,077,000 9,176,000 11,102,000 
        long-term lease liabilities
      9,322,000 9,878,000 10,272,000 10,614,000 10,987,000 11,322,000 10,570,000 10,674,000 908,000 1,211,000 1,354,000 1,843,000 2,338,000 2,856,000 3,354,000 3,851,000 3,350,000 3,642,000 4,033,000 4,374,000 
        total liabilities
      36,698,000 36,131,000 32,563,000 30,997,000 33,728,000 37,325,000 33,208,000 30,292,000 19,236,000 22,188,000 20,371,000 38,073,000 57,523,000 60,262,000 59,747,000 56,728,000 53,899,000 54,479,000 52,845,000 54,982,000 
        commitments and contingencies
                          
        stockholders' equity:
                          
        common stock, 0.001 par value...
      41,000 41,000 41,000 41,000 41,000 40,000 40,000 40,000 37,000 36,000 36,000 35,000 34,000 28,000 28,000 27,000 27,000    
        preferred stock, 0.001 par value...
                         353,300,000 
        additional paid-in capital
      944,244,000 936,628,000 927,756,000 920,159,000 909,545,000 903,127,000 892,857,000 885,104,000 767,685,000 754,971,000 746,966,000 730,274,000 704,228,000 636,001,000 626,491,000 623,746,000 620,106,000 617,511,000 614,418,000 137,838,000 
        accumulated other comprehensive income
      -67,000  60,000 -117,000 15,000  521,000              
        accumulated deficit
      -676,923,000 -661,039,000 -651,887,000 -642,071,000 -630,285,000 -622,095,000 -616,157,000 -609,819,000 -603,740,000 -594,640,000 -585,463,000 -573,048,000 -559,244,000 -546,032,000 -530,422,000 -513,604,000 -496,872,000 -479,276,000 -463,543,000 -450,870,000 
        total stockholders' equity
      267,295,000 275,683,000 275,970,000 278,012,000 279,316,000 281,238,000 277,261,000 275,207,000 163,929,000 160,362,000 161,479,000 157,188,000 145,009,000 89,902,000 95,959,000 109,986,000 123,163,000 138,242,000 150,891,000  
        total liabilities and stockholders' equity
      303,993,000 311,814,000 308,533,000 309,009,000 313,044,000 318,563,000 310,469,000 305,499,000 183,165,000 182,550,000 181,850,000 195,261,000 202,532,000 150,164,000 155,706,000 166,714,000 177,062,000    
        other long-term liabilities
           127,000    74,000 75,000 76,000         
        accumulated other comprehensive loss
       53,000    166,000  -118,000 -53,000 -5,000 -60,000 -73,000 -9,000 -95,000 -138,000 -183,000 -98,000 -20,000 -11,000 -3,000 
        term loan
                 19,589,000 40,309,000 40,169,000 40,025,000 39,881,000 39,890,000 39,760,000 39,636,000 39,506,000 
        liabilities, redeemable common stock, stock options, convertible preferred stock and stockholders' equity
                          
        warrant liability
                         2,614,000 
        long-term warrant liability
                          
        redeemable common stock:
                          
        notes receivable for common stock issued
                          
        redeemable stock options
                          
        convertible preferred stock:
                          
        stockholders' equity
                          
        series g common stock, 0.001 par value...
                          
        series w common stock, 0.001 par value...
                          
        total liabilities, redeemable common stock, stock options, convertible preferred stock and stockholders' equity
                       192,721,000 203,736,000  
        stockholders' deficit:
                          
        the balance sheet at december 31,2020 has been derived from the audited consolidated financial statements included in rxsight, inc.'s final prospectus for its public offering filed on july 29, 2021.
                          
        liabilities, redeemable common stock, stock options, convertible preferred stock and stockholders' deficit
                          
        total stockholders' deficit
                         -313,396,000 
        total liabilities, redeemable common stock, stock options, convertible preferred stock and stockholders' deficit
                         94,886,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 
                           
          operating activities:
                           
          net loss
        -15,884,000 -9,152,000 -9,816,000 -11,786,000 -8,190,000 -5,938,000 -6,338,000 -6,079,000 -9,100,000 -9,177,000 -12,415,000 -13,804,000 -13,212,000 -15,610,000 -16,818,000 -16,732,000 -17,596,000   
          adjustments to reconcile net loss to net cash from operating activities:
                           
          depreciation and amortization
        834,000 851,000 854,000 785,000 776,000 515,000 1,133,000 812,000 1,115,000 1,051,000 1,083,000 989,000 955,000 918,000 941,000 1,009,000 1,016,000 1,025,000 1,006,000 
          provision for bad debts
         11,000 21,000              
          amortization of right-of-use lease assets
            9,000 8,000 8,000 8,000 25,000 33,000 47,000 41,000 44,000 43,000 39,000 37,000 19,000 -6,000 4,000 
          amortization of discount on short-term investments
        -1,854,000 -1,832,000 -2,144,000 -2,130,000 -2,411,000 -2,628,000 -2,771,000 -2,073,000 -1,505,000 -1,577,000 -1,592,000 -1,696,000 -1,257,000 -783,000 -391,000 -184,000 -47,000 -11,000 -4,000 
          stock-based compensation
        7,945,000 7,817,000 8,108,000 8,547,000 7,140,000 7,282,000 6,552,000 6,105,000 4,696,000 4,425,000 4,071,000 3,955,000 3,295,000 2,962,000 2,882,000 2,904,000 2,649,000 2,917,000 2,013,000 
          provision for excess and obsolete inventory
        60,000 616,000 66,000 1,219,000 31,000 71,000 166,000 56,000 111,000 151,000 -1,000 4,000 10,000 298,000 334,000 47,000 73,000 10,000  
          change in operating assets and liabilities:
                           
          accounts receivable
        936,000 788,000 3,907,000 2,888,000 -928,000 -4,682,000 320,000 -4,172,000 -1,269,000 -5,037,000 -1,950,000 -626,000 -1,712,000 -1,935,000 -2,137,000 -1,258,000 -764,000 -504,000 -421,000 
          inventories
        -3,370,000 -3,225,000 -3,955,000 -2,705,000 -1,597,000 -408,000 -2,396,000 -799,000 -1,390,000 1,352,000 -977,000 117,000 -3,241,000 203,000 -4,048,000 -3,180,000 -530,000 1,400,000 -1,507,000 
          prepaid and other assets
        120,000 -881,000 322,000 1,488,000 254,000 -2,080,000 177,000 104,000 569,000 -1,559,000 129,000 1,328,000 -460,000 -824,000 514,000 285,000 814,000 346,000 -1,905,000 
          accounts payable
        1,577,000 2,204,000 -86,000 -3,717,000 2,226,000 116,000 41,000 -387,000 1,176,000 -158,000 84,000 161,000 1,163,000 -1,696,000 983,000 647,000 701,000 101,000 -741,000 
          accrued expenses and other liabilities
        -1,255,000 1,698,000 1,557,000 1,033,000 -6,163,000 3,484,000 3,724,000 2,398,000 -3,737,000 2,195,000 2,128,000 1,481,000 -3,490,000 2,426,000 2,370,000 1,467,000 -1,450,000 1,602,000 1,235,000 
          net cash from operating activities
        -10,891,000 -1,116,000 -1,187,000 -4,376,000 -8,832,000 -4,260,000 650,000 -4,027,000 -9,309,000 -8,301,000 -7,982,000 -7,546,000 -17,764,000 -13,854,000 -15,188,000 -14,823,000 -14,985,000 -8,722,000 -13,755,000 
          capital expenditures
        -589,000 -696,000 -1,491,000 -371,000 -695,000 -939,000 -1,637,000 -1,624,000 -1,520,000 -850,000 -1,674,000 -488,000 -214,000 -667,000 -1,040,000 -173,000 -473,000 -192,000 
          free cash flows
        -11,480,000 -1,116,000 -1,883,000 -5,867,000 -9,203,000 -4,955,000 -289,000 -5,664,000 -10,933,000 -9,821,000 -8,832,000 -9,220,000 -18,252,000 -14,068,000 -15,855,000 -15,863,000 -15,158,000 -9,195,000 -13,947,000 
          investing activities:
                           
          purchases of property and equipment
        -759,000  -581,000 -1,537,000 -575,000             -365,000 -254,000 
          maturities of short-term investments
        110,000,000  60,000,000 50,000,000 60,000,000               
          purchases of short-term investments
        -100,393,000 -98,477,000 -68,423,000 -33,811,000 -38,570,000 -52,833,000 -77,157,000 -159,122,000 -47,759,000 -43,843,000 -72,072,000 -48,782,000 -107,618,000 -34,233,000 -73,860,000 -29,793,000 -74,771,000   
          net cash from investing activities
        8,848,000 -9,614,000 -9,004,000 14,652,000 20,855,000 1,320,000 -9,260,000   4,566,000 17,275,000 4,395,000 -48,365,000 10,405,000 560,000 14,126,000 14,859,000 -35,346,000 -80,241,000 
          financing activities:
                           
          proceeds from issuance of common stock
        144,000 1,056,000 131,000 2,068,000 696,000 2,988,000 3,835,000 3,840,000 10,153,000 3,583,000 1,994,000    145,000     
          payments for employee taxes related to stock compensation
        -473,000 -2,000 -642,000 -1,418,000 -2,635,000 1,000 -2,134,000 -2,000 -1,084,000 -337,000 -281,000 -362,000   
          principal payments on finance lease liabilities
        -7,000 9,000 -19,000 -3,000 -13,000 -12,000 -11,000 -11,000 -27,000 -34,000 -37,000 -41,000 -41,000 -39,000 -22,000 -16,000 -44,000 -6,000 -5,000 
          net cash from financing activities
        -336,000 1,063,000 -530,000 2,065,000 -735,000 2,976,000 878,000 111,473,000 7,992,000 3,562,000 -8,234,000 891,000 65,305,000 6,307,000 -455,000 578,000 -98,000 404,000 120,547,000 
          effect of foreign exchange rate on cash, cash equivalents and restricted cash
        3,000 -15,000 -2,000 14,000 6,000 -12,000 7,000 -1,000 -3,000 8,000 -5,000 1,000 2,000 14,000 -9,000 -9,000 -5,000 -3,000 -4,000 
          net increase in cash, cash equivalents and restricted cash
        -2,376,000 -9,683,000 -10,723,000 12,355,000 11,294,000 24,000 -7,725,000 -8,200,000 22,954,000     2,872,000 -15,092,000 -128,000 -229,000 -43,667,000 26,547,000 
          cash, cash equivalents and restricted cash - beginning of period
        20,699,000 17,456,000 1,000 10,402,000 12,595,000 25,172,000 
          cash, cash equivalents and restricted cash - end of period
        18,323,000 -9,683,000 -10,723,000 12,355,000 28,750,000 25,000 -7,725,000 -8,200,000 33,356,000 -166,000 1,055,000 -2,259,000 11,773,000 2,872,000 -15,092,000 -128,000 24,943,000 -43,667,000 26,547,000 
          supplemental disclosure of cash flow information:
                           
          operating cash flows from operating leases
        980,000 684,000 560,000 689,000 694,000 521,000 505,000 580,000 548,000 550,000 559,000 561,000 546,000 669,000 495,000 524,000 499,000 337,000 334,000 
          cash paid for income taxes
         -12,000 67,000 3,000 -2,000 2,000   -4,000     1,000 5,000 
          non-cash investing and financing activities:
                           
          acquisition of property and equipment included in accounts payable and accrued expenses and accrued liabilities
        170,000  -115,000 46,000 204,000               
          amortization of debt issuance costs and premium
                 4,000 142,000 141,000 144,000 143,000 135,000 130,000 132,000 132,000 
          loss on extinguishment of debt
                 1,407,000         
          purchase of property and equipment
             -847,000 -1,103,000 -1,523,000 -1,967,000 -1,591,000 -653,000 -1,823,000 -747,000 -362,000 -580,000 -1,081,000 -370,000   
          maturity of short-term investments
             55,000,000 69,000,000 45,000,000 74,000,000 50,000,000 90,000,000 55,000,000 60,000,000 45,000,000 75,000,000 45,000,000 90,000,000   
          proceeds from term loan
                       
          repayment of term loan
                 -20,000,000         
          proceeds from issuance of common stock from public offering
               54,050,000       
          proceeds from issuance of common stock from at-the-market offerings
                           
          payments of deferred offering costs
             -391,000   25,000 -45,000 -372,000 -230,000 -292,000     
          payments of debt issuance costs
                 -11,000 -999,000   -1,000 -2,000   -8,000 -2,000 
          cash paid for interest on term loan
                 224,000 1,896,000 1,344,000 1,214,000 1,121,000 979,000 925,000 945,000 946,000 
          right-of-use assets obtained in exchange for lease obligations:
                           
          operating lease
             956,000   38,000    1,003,000 87,000 23,000  
          lease obligations recorded for right-of-use assets:
                           
          acquisition of property and equipment included in accounts payable and accrued expenses and other current liabilities
             152,000 164,000 -114,000 343,000 71,000 -197,000 149,000 259,000 148,000 -87,000 41,000 197,000 -108,000 62,000 
          deferred offering and financing costs included in accounts payable and accrued liabilities
               167,000 225,000           
          reclassification of deferred financing costs
             1,536,000   90,000 2,375,000 -1,020,000 -55,000       
          cash paid for interest on financing leases
            5,000 5,000 5,000 6,000 5,000 4,000 1,000 3,000 4,000 6,000 9,000 3,000 1,000 1,000 
          finance lease
             10,000 9,000     23,000 96,000 192,000   
          net cash provided (used in) by investing activities
                24,274,000           
          proceeds from issuance of common stock for at-the-market offerings
                 1,000 11,937,000 19,394,000 11,102,000       
          net decrease in cash, cash equivalents and restricted cash
                 -166,000 1,055,000 -2,259,000 -822,000       
          deferred offering costs included in accounts payable and accrued liabilities
                 -14,000 -28,000 -279,000 466,000 -217,000      
          proceeds from exercise of stock options
                    761,000    308,000 176,000 46,000 
          cash paid for amounts included in the measurement of lease liabilities:
                           
          change in fair value of warrants
                         -1,503,000 
          gain on expiration of warrant
                         
          proceeds from exercise of preferred stock warrants
                          
          proceeds from exercise of stock options and issuance of common stock under the employee stock purchase plan
                           
          proceeds from initial public offering, net of underwriting discounts and commissions and offering costs
                          
          proceeds from issuance of common stock in at-the-market offerings
                           
          change in notes receivables for redeemable common stock issued
                          
          payment-in-kind interest income added to principal of notes receivable
                         2,000 
          reclassification from warrant liability to additional paid-in capital for warrants exercised
                          
          reclassification of 4,093,995 shares of redeemable common stock to 4,093,995 shares of common stock
                         
          reclassification of redeemable common stock options to common stock options
                         
          conversion of preferred stock to common stock upon initial public offering
                          
          deferred offering costs reclassified to additional paid in capital
                           
          deferred offering costs included in accrued expenses
                           
          net income
                         -15,734,000 -12,672,000 
          adjustments to reconcile net income to net cash from operating activities:
                           
          gain on sale of equipment
                           
          proceeds from sale of equipment
                           
          purchase of short-term investments
                           
          accretion to redemption value of redeemable stock and stock options
                           
          deferred initial public offering costs recorded to additional paid in capital
                           
          proceeds from maturities of short-term investments
                           
          benefit from excess and obsolete inventory
                           
          change in notes receivable for redeemable common stock issued