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Unit: USD	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	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31	2009-12-31	2009-09-30	2009-06-30	2009-03-31	2008-12-31	2008-09-30	2008-06-30	2008-03-31	2007-12-31	2007-09-30	2007-06-30	2007-03-31	2006-12-31	2006-09-30	2006-06-30	2006-03-31	2005-12-31	2005-09-30	2005-06-30	2005-03-31	2004-12-31	2004-09-30	2004-06-30	2004-03-31	2003-12-31	2002-03-31

assets
current assets:
cash and cash equivalents	483,380,000	489,572,000	457,415,000	398,361,000	363,355,000	362,213,000	389,674,000	297,655,000	279,944,000	332,716,000	386,794,000	352,044,000	320,325,000	332,502,000	636,161,000	548,105,000	468,470,000	487,168,000	467,176,000	477,755,000	415,719,000	403,306,000	338,489,000	287,660,000	245,064,000	353,721,000	409,632,000	369,054,000	332,183,000	353,416,000	369,821,000	331,912,000	251,505,000	261,736,000	304,880,000	244,833,000	195,423,000	210,870,000	210,711,000	230,521,000	215,539,000	94,352,000	104,893,000	106,704,000	78,986,000	88,974,000	102,076,000	88,648,000	94,917,000	102,727,000	99,930,000	90,836,000	160,386,000	135,025,000	117,255,000	102,762,000	103,859,000	39,473,000	67,168,000	121,482,000	114,043,000	98,063,000	63,322,000	66,524,000	84,698,000	75,733,000	82,222,000	63,204,000	64,810,000	68,708,000	56,702,000	52,497,000	31,923,000	12,650,000		70,151,000	56,108,000	51,999,000	61,676,000	56,278,000	32,706,000	33,498,000	57,070,000	33,500,000	37,870,000	30,092,000	19,011,000	23,154,000
marketable securities and investments	33,483,000	42,937,000	34,058,000	28,536,000	37,512,000	43,954,000	33,459,000	31,457,000	48,652,000	51,887,000
accounts receivable and unbilled costs, net of allowance for credit losses of 98 and 214 at september 30, 2025 and march 31, 2025, respectively	130,158,000
inventories and deferred costs	12,381,000	13,047,000	12,891,000	14,414,000	16,388,000	14,994,000	14,095,000	15,342,000	15,909,000	18,449,000	17,956,000	18,621,000	24,063,000	22,840,000	28,220,000	21,500,000	25,728,000	20,841,000	22,813,000	26,040,000	26,223,000	27,300,000	22,227,000	24,977,000	26,195,000	26,479,000	26,270,000	28,909,000	30,985,000	32,739,000	34,774,000	36,592,000	36,956,000	41,013,000	40,002,000	54,151,000	52,860,000	58,842,000
prepaid income taxes	14,660,000	14,800,000	13,380,000	8,800,000	15,391,000	13,352,000	11,076,000	14,946,000	13,619,000	10,834,000	2,235,000	8,780,000	30,420,000	21,271,000	9,349,000	4,355,000	11,526,000	11,534,000	1,906,000	9,566,000	8,998,000	12,392,000	13,505,000	14,454,000	13,109,000	19,614,000	18,000,000	23,826,000	25,143,000	28,544,000	22,932,000	23,483,000	48,563,000	48,523,000	40,346,000	18,913,000	34,435,000	28,402,000	18,137,000	37,795,000	40,694,000		1,393,000	2,864,000	6,742,000	1,207,000	1,012,000		1,920,000	1,523,000	0	8,917,000	8,282,000	4,939,000	4,600,000	4,413,000	3,563,000	5,376,000	3,205,000		2,386,000	442,000	2,730,000	6,788,000	6,764,000
prepaid expenses and other current assets	33,969,000	31,359,000	31,786,000	27,461,000	32,435,000	26,267,000	32,094,000	28,344,000	29,794,000	27,493,000	34,316,000	29,402,000	27,649,000	31,749,000	32,927,000	26,425,000	25,629,000	23,777,000	23,583,000	28,548,000	36,654,000	25,782,000	24,039,000	25,807,000	31,209,000	31,643,000	35,658,000	27,001,000	27,429,000	32,407,000	33,502,000	23,686,000	29,043,000	29,026,000	36,972,000	28,808,000	42,444,000	65,855,000	78,399,000	49,421,000	72,218,000	8,425,000	13,495,000	9,846,000	9,052,000	9,328,000	11,496,000	8,800,000	8,292,000	7,215,000	9,043,000	9,465,000	6,645,000	5,588,000	6,162,000	5,692,000	4,542,000	4,765,000	4,814,000	4,800,000	4,684,000	4,418,000	5,422,000	4,667,000	4,675,000	5,108,000	4,939,000	5,673,000	5,132,000	6,804,000	13,546,000	12,008,000	2,845,000	3,401,000		3,285,000	2,198,000	2,953,000		2,225,000
total current assets	708,031,000	683,915,000	713,184,000	692,157,000	583,713,000	590,050,000	672,494,000	609,318,000	540,521,000	549,671,000	617,360,000	681,947,000	588,389,000	563,395,000	921,939,000	839,588,000	701,588,000	696,256,000	722,472,000	762,614,000	669,408,000	630,775,000	659,743,000	654,049,000	572,994,000	675,850,000	801,222,000	802,233,000	719,831,000	718,074,000	752,408,000	713,507,000	636,876,000	704,898,000	854,466,000	745,630,000	665,058,000	668,939,000	740,478,000	753,872,000	697,543,000	307,893,000	337,284,000	315,244,000	264,226,000	246,794,000	278,762,000	248,601,000	223,057,000	229,241,000	237,312,000	219,541,000	286,283,000	270,708,000	289,687,000	236,665,000	242,709,000	246,264,000	283,726,000	259,043,000	229,817,000	219,531,000	218,784,000	196,666,000	168,738,000	163,595,000	169,185,000	158,172,000	127,100,000	134,705,000	135,932,000	157,354,000	132,235,000	120,370,000		111,669,000	114,814,000	111,501,000	109,406,000	104,727,000	94,055,000	98,306,000	105,621,000	95,426,000	90,755,000	91,183,000	89,604,000	79,280,000
fixed assets	21,290,000	21,494,000	21,529,000	22,054,000	23,244,000	24,903,000	26,487,000	27,955,000	30,637,000	33,207,000	34,735,000	37,590,000	38,752,000	40,328,000	41,337,000	42,723,000	45,008,000	46,973,000	48,474,000	51,265,000	53,168,000	55,228,000	57,715,000	58,700,000	58,505,000	56,393,000	58,951,000	60,789,000	63,617,000	60,006,000	52,511,000	53,646,000	57,413,000	60,269,000	61,393,000	61,900,000	64,003,000	64,058,000	62,033,000	58,663,000	60,398,000	24,902,000	23,864,000	23,016,000	21,721,000	22,742,000	23,098,000	21,350,000	21,797,000	20,565,000	19,678,000	18,077,000	16,505,000	17,029,000	16,457,000	15,213,000	15,431,000	14,629,000	13,467,000	12,359,000	12,774,000	12,848,000	12,773,000	11,604,000	12,434,000	13,279,000	13,848,000	13,965,000	15,104,000	15,747,000	16,729,000	17,563,000	8,869,000	8,868,000		8,069,000	8,217,000	7,757,000	7,577,000	7,415,000	6,880,000	6,407,000	6,011,000	6,252,000	5,810,000	5,686,000	5,415,000	5,844,000
operating lease right-of-use assets	38,388,000	36,226,000	37,717,000	36,582,000	38,498,000	39,911,000	42,486,000	44,977,000	47,000,000	49,432,000	51,456,000	51,096,000	49,757,000	52,473,000	54,996,000	56,268,000	56,715,000	58,899,000	61,512,000	63,257,000	65,562,000	68,025,000	68,583,000	65,738,000	65,118,000	67,536,000
goodwill	1,069,517,000	1,070,155,000	1,076,383,000	1,079,111,000	1,073,355,000	1,076,715,000	1,502,820,000	1,551,541,000	1,722,004,000	1,723,536,000	1,724,404,000	1,725,729,000	1,733,342,000	1,726,200,000	1,723,156,000	1,720,713,000	1,717,870,000	1,716,092,000	1,717,554,000	1,714,109,000	1,718,595,000	1,721,649,000	1,725,680,000	1,718,496,000	1,719,362,000	1,717,945,000	1,715,485,000	1,715,523,000	1,712,962,000	1,718,499,000	1,712,764,000	1,716,371,000	1,715,861,000	1,715,512,000	1,718,162,000	1,720,911,000	1,714,539,000	1,710,286,000	1,709,369,000	1,693,876,000	1,702,705,000	198,222,000	197,445,000	200,271,000	201,457,000	203,034,000	203,446,000	203,201,000	202,863,000	202,582,000	202,453,000	203,251,000	181,299,000	169,522,000	170,384,000	169,952,000	141,356,000	141,356,000	128,177,000	128,177,000	128,177,000	128,177,000	128,177,000	128,177,000	128,177,000	128,177,000	128,177,000	131,754,000	131,754,000	131,802,000	131,802,000	135,295,000	36,561,000	36,561,000	36,561,000	36,561,000	36,561,000	36,561,000	36,561,000	36,561,000	36,561,000	36,533,000	28,839,000	28,839,000	28,839,000	28,839,000	28,839,000	28,839,000
intangible assets	238,389,000	249,902,000	258,690,000	270,027,000	285,605,000	295,290,000	308,659,000	323,899,000	336,445,000	352,497,000	366,591,000	382,257,000	393,650,000	414,950,000	433,419,000	453,719,000	474,448,000	494,412,000	511,866,000	535,095,000	551,783,000	569,477,000	582,179,000	602,856,000	624,799,000	648,997,000	669,118,000	693,763,000	720,949,000	756,418,000	831,374,000	859,160,000	887,974,000	906,345,000	931,269,000	959,042,000	998,169,000	1,023,968,000	1,054,040,000	1,075,532,000	1,102,717,000	48,815,000	50,180,000	52,469,000	54,465,000	56,643,000	58,513,000	59,827,000	60,896,000	62,317,000	63,827,000	65,433,000	56,066,000	52,452,000	54,685,000	56,390,000	48,939,000	50,500,000
deferred income taxes	78,845,000	72,689,000	66,294,000	62,519,000	54,978,000	47,855,000	30,767,000	19,518,000	4,468,000	4,610,000	4,534,000	6,693,000	6,232,000	6,646,000	6,883,000	7,817,000	8,064,000	8,201,000	8,096,000	6,982,000	6,690,000	6,491,000	6,220,000	7,034,000	7,006,000	7,110,000	7,218,000	4,776,000	5,640,000	5,575,000	6,685,000	5,725,000	5,590,000	5,477,000	6,580,000	2,485,000	3,263,000	5,040,000			29,796,000	21,053,000	21,755,000	14,174,000	14,372,000	14,414,000	15,846,000	9,419,000	9,434,000	9,581,000	9,538,000	5,664,000	4,128,000	4,336,000	4,237,000	3,624,000	3,585,000	3,379,000	3,383,000	2,614,000	2,583,000	2,813,000	2,698,000	2,897,000	2,796,000	2,796,000	2,796,000	4,257,000	5,191,000	5,985,000	6,052,000	3,620,000	2,747,000	2,679,000		2,909,000	2,827,000	2,837,000	2,896,000	2,406,000	2,318,000	2,361,000	2,356,000	2,082,000	1,750,000	1,687,000	1,667,000	1,667,000
long-term marketable securities	10,042,000	10,997,000	1,004,000	1,015,000	1,009,000	1,003,000	994,000	1,010,000	3,959,000	5,881,000	8,940,000	6,906,000											2,613,000	2,561,000	7,630,000	5,087,000	1,012,000	1,002,000				3,187,000	6,292,000	9,195,000	21,933,000	17,206,000	8,675,000	15,309,000	13,361,000	17,961,000	32,708,000	60,303,000	58,572,000	46,055,000	47,542,000	56,580,000	41,484,000	37,222,000	22,438,000	13,762,000	16,823,000	10,540,000	5,615,000	29,690,000	16,644,000	28,360,000	26,528,000	27,442,000	27,880,000	24,341,000	28,702,000	29,415,000	37,354,000	35,349,000	28,856,000	28,798,000	29,528,000	30,658,000	31,487,000	32,522,000	33,764,000		6,094,000	12,035,000		10,813,000	3,315,000	6,030,000	5,979,000	3,022,000	6,007,000			5,972,000	5,962,000	5,968,000	6,016,000	12,528,000
other assets	11,682,000	12,048,000	11,777,000	11,280,000	10,270,000	9,689,000	10,595,000	11,581,000	12,677,000	11,763,000	12,540,000	11,894,000	11,931,000	12,643,000	12,979,000	12,721,000	12,705,000	12,221,000	15,064,000	13,001,000	12,345,000	15,882,000	17,770,000	17,905,000	13,960,000	15,083,000	16,988,000	19,298,000	20,006,000	19,036,000	12,866,000	7,423,000	7,919,000	8,134,000	7,710,000	5,723,000	6,078,000	6,858,000	7,356,000	7,775,000	7,588,000	1,617,000	1,704,000	1,873,000	2,130,000	2,344,000	2,460,000	2,047,000	2,285,000	2,439,000	2,872,000	3,523,000	2,095,000	1,840,000	2,008,000	2,463,000	1,244,000	1,359,000	1,467,000	1,660,000	1,811,000	1,850,000	1,878,000	1,813,000	1,668,000	1,260,000	1,445,000	1,542,000	723,000	787,000	1,166,000	991,000	1,692,000	100,000		71,000	29,000	13,000	16,000	19,000	9,000	12,000	9,000	18,000	39,000	36,000	45,000
total assets	2,176,184,000	2,157,426,000	2,186,578,000	2,174,745,000	2,070,672,000	2,085,416,000	2,595,302,000	2,589,799,000	2,697,711,000	2,730,597,000	2,820,560,000	2,904,112,000	2,822,053,000	2,816,635,000	3,194,709,000	3,133,549,000	3,016,398,000	3,033,054,000	3,085,038,000	3,146,323,000	3,077,551,000	3,067,527,000	3,120,503,000	3,127,339,000	3,069,374,000	3,194,001,000	3,269,994,000	3,297,384,000	3,243,005,000	3,277,608,000	3,368,608,000	3,359,019,000	3,317,925,000	3,409,830,000	3,601,513,000	3,512,897,000	3,459,785,000	3,494,458,000	3,592,843,000	3,635,114,000	3,604,071,000	641,752,000	669,049,000	638,928,000	591,541,000	588,137,000	607,763,000	577,877,000	541,401,000	539,657,000	552,176,000	532,120,000	561,771,000	556,626,000	567,757,000	530,892,000	500,151,000	506,470,000	527,570,000	504,408,000	479,170,000	472,446,000	482,601,000	461,476,000	429,518,000	427,415,000	436,734,000	432,998,000	404,591,000	415,533,000	420,937,000	410,790,000	191,228,000	183,785,000	180,419,000	173,030,000	168,557,000	167,830,000	165,755,000	158,731,000	152,788,000	151,377,000	148,287,000	144,900,000	140,602,000	140,638,000	139,181,000	135,126,000
liabilities and stockholders' equity
current liabilities:
accounts payable	14,706,000	14,016,000	18,208,000	13,693,000	13,911,000	15,938,000	14,506,000	15,132,000	15,569,000	14,400,000	16,473,000	15,451,000	21,474,000	19,848,000	21,959,000	18,436,000	17,644,000	16,961,000	17,964,000	19,219,000	18,083,000	17,288,000	20,004,000	19,756,000	34,855,000	25,578,000	24,582,000	29,432,000	22,102,000	25,122,000	30,133,000	32,469,000	30,128,000	30,551,000	37,407,000	41,660,000	45,853,000	45,607,000	43,969,000	52,660,000	37,425,000	11,203,000	13,077,000	10,927,000	10,193,000	9,888,000	11,541,000	8,679,000	8,719,000	12,130,000	10,161,000	9,151,000	8,344,000	8,106,000	7,539,000	6,585,000	7,845,000	6,579,000	9,709,000	5,521,000	6,415,000	8,521,000	7,307,000	8,484,000	8,118,000	6,946,000	6,385,000	6,688,000	7,326,000	7,319,000	9,207,000	14,027,000	4,507,000	2,973,000		2,799,000	4,070,000	2,469,000	2,727,000	2,818,000	3,481,000	2,524,000	2,520,000	2,674,000	1,863,000	2,435,000	1,984,000	1,915,000
accrued compensation	53,461,000	46,978,000	56,696,000	54,657,000	41,485,000	63,059,000	51,362,000	42,283,000	36,935,000	53,627,000	83,279,000	72,259,000	55,385,000	51,000,000	75,788,000	67,332,000	57,783,000	53,292,000	83,057,000	76,900,000	61,842,000	53,688,000	75,632,000	70,430,000	50,202,000	41,379,000	58,501,000	71,612,000	54,258,000	55,331,000	46,552,000	54,010,000	62,776,000	61,242,000	77,607,000	83,459,000	65,226,000	68,748,000	82,303,000	100,817,000	73,482,000	21,780,000	36,553,000	39,369,000	30,891,000	23,749,000	34,901,000	32,327,000	23,766,000	20,132,000	31,585,000	29,016,000	22,228,000	19,119,000	23,050,000	20,763,000	17,323,000	14,152,000	21,854,000	19,203,000	17,483,000	13,836,000	19,806,000	17,884,000	12,674,000	12,205,000	23,156,000	22,719,000	18,441,000	20,397,000	23,594,000	25,680,000	8,219,000	8,011,000		7,211,000	6,074,000	7,490,000	8,635,000	7,279,000	6,585,000	6,595,000	6,385,000	5,323,000	4,995,000	5,018,000	4,481,000	3,728,000
accrued other	21,601,000	20,310,000	19,397,000	16,915,000	15,192,000	12,399,000	14,665,000	17,844,000	18,337,000	19,055,000	26,283,000	22,431,000	26,972,000	33,194,000	32,064,000	31,821,000	31,802,000	21,726,000	21,127,000	36,801,000	34,484,000	25,875,000	21,840,000	20,159,000	19,223,000	23,545,000	23,027,000	24,185,000	32,364,000	30,997,000	33,164,000	30,335,000	28,881,000	25,908,000	29,522,000	28,684,000	29,454,000	28,160,000	32,045,000	23,828,000	27,660,000	7,509,000	14,474,000	11,026,000	9,349,000	6,182,000	6,430,000	7,070,000	7,292,000	6,671,000	7,027,000	7,404,000	5,914,000	5,799,000	6,235,000	6,932,000	4,862,000	3,826,000	4,786,000	5,096,000	4,218,000	4,573,000	5,051,000	5,020,000	4,849,000	5,132,000	5,407,000	7,067,000	5,825,000	5,842,000	8,563,000					2,365,000	2,249,000	2,139,000	2,325,000	2,469,000	3,073,000	2,927,000	2,976,000	3,093,000	2,480,000	2,334,000	2,140,000	2,201,000
income taxes payable	883,000	884,000	883,000	764,000	764,000	764,000	764,000	1,604,000	1,604,000	1,604,000	4,391,000	1,683,000	574,000	2,924,000	4,353,000	5,382,000	4,840,000	5,492,000	7,025,000	233,000	233,000	233,000	903,000	1,517,000	1,517,000	1,517,000	1,318,000	210,000	210,000	210,000	1,526,000	3,240,000	6,263,000	5,057,000	5,057,000			2,091,000	2,091,000			147,000	107,000				791,000	705,000	0	0	114,000									1,652,000				6,196,000	4,780,000	3,122,000	1,702,000	5,076,000	2,173,000	1,290,000	1,065,000	839,000	380,000	809,000	192,000	936,000	1,135,000	467,000								490,000	490,000
deferred revenue and customer deposits	276,768,000	293,911,000	301,753,000	284,783,000	263,874,000	279,185,000	301,806,000	293,410,000	275,008,000	282,773,000	311,531,000	317,406,000	287,328,000	297,243,000	330,585,000	296,814,000	246,726,000	257,969,000	269,748,000	251,313,000	236,240,000	249,382,000	270,281,000	261,151,000	234,229,000	246,498,000	272,508,000	260,926,000	230,098,000	248,165,000	301,925,000	299,271,000	269,644,000	279,489,000	310,594,000	299,218,000	282,045,000	279,974,000	296,648,000	255,822,000	233,405,000
current portion of operating lease liabilities	10,009,000	10,883,000	10,995,000	10,959,000	11,876,000	11,859,000	11,979,000	11,979,000	11,671,000	11,727,000	11,650,000	10,779,000	10,463,000	10,985,000	11,411,000	11,441,000	11,992,000	12,125,000	12,354,000	11,753,000	11,325,000	11,026,000	10,337,000	11,091,000	10,533,000	11,066,000
total current liabilities	377,428,000	386,982,000	407,932,000	381,771,000	347,102,000	383,204,000	395,082,000	382,252,000	359,124,000	383,186,000	453,607,000	440,009,000	402,196,000	415,194,000	476,160,000	431,226,000	370,787,000	367,565,000	411,275,000	396,219,000	362,207,000	357,492,000	398,997,000	384,104,000	350,559,000	349,583,000	379,936,000	386,365,000	339,032,000	359,825,000	413,300,000	419,325,000	397,692,000	402,247,000	460,187,000	453,021,000	422,578,000	424,580,000	457,056,000	433,127,000	374,224,000	148,818,000	187,633,000	168,917,000	145,455,000	141,690,000	162,964,000	150,791,000	128,096,000	132,682,000	145,171,000	140,362,000	120,011,000	125,558,000	134,091,000	120,096,000	122,406,000	118,175,000	136,590,000	126,856,000	113,676,000	115,100,000	127,610,000	120,168,000	102,358,000	106,828,000	117,465,000	120,880,000	101,246,000	115,999,000	122,936,000	106,904,000	39,161,000	38,494,000		34,680,000	33,778,000	35,654,000	36,408,000	32,168,000	29,411,000	29,471,000	29,561,000	26,841,000	24,170,000	25,813,000	25,063,000	22,463,000
other long-term liabilities	7,911,000	8,132,000	8,210,000	7,525,000	6,622,000	6,897,000	7,055,000	7,312,000	7,371,000	7,534,000	7,683,000	7,554,000	7,468,000	7,642,000	7,470,000	7,499,000	12,315,000	22,180,000	21,641,000	11,568,000	14,646,000	14,449,000	10,039,000	6,997,000	7,199,000	6,191,000	19,493,000	20,057,000	20,449,000	15,092,000	8,308,000	7,412,000	5,432,000	4,340,000	3,976,000	3,098,000	3,224,000	2,606,000	2,903,000	2,291,000	5,445,000	1,858,000	1,995,000	2,147,000	2,225,000	2,275,000	2,370,000	2,415,000	2,531,000	2,670,000	2,249,000	2,044,000	2,110,000	2,161,000	2,347,000	2,170,000	2,028,000	1,887,000	1,721,000	1,166,000	817,000	455,000	551,000	632,000	684,000	730,000	771,000	804,000	878,000	853,000	159,000	915,000	961,000	1,007,000	1,008,000	1,054,000
deferred tax liability	2,872,000	2,851,000	2,643,000	3,652,000	3,955,000	4,326,000	4,374,000	4,505,000	3,224,000	13,625,000	24,939,000	40,119,000	71,510,000	75,192,000	78,899,000	80,763,000	85,987,000	89,591,000	92,287,000	105,510,000	108,716,000	111,194,000	114,394,000	115,470,000	120,895,000	124,870,000	124,229,000	129,284,000	135,738,000	143,542,000	151,563,000	177,598,000	260,371,000	268,364,000	277,599,000	246,192,000	259,625,000	272,763,000	285,359,000	330,254,000	2,252,000	10,653,000	10,639,000	2,679,000	2,708,000	2,747,000	2,757,000	991,000	979,000	950,000	941,000	2,467,000	1,961,000	1,330,000	1,410,000	1,590,000
accrued long-term retirement benefits	29,571,000	29,418,000	27,379,000	27,346,000	29,253,000	28,124,000	28,413,000	26,310,000	25,363,000	26,257,000	26,049,000	34,182,000	30,917,000	33,688,000	34,737,000	38,576,000	39,704,000	40,255,000	39,479,000	38,264,000	36,408,000	35,120,000	34,256,000	35,808,000	35,332,000	35,811,000	36,284,000	33,320,000	34,053,000	33,457,000	35,246,000	35,589,000	35,548,000	33,301,000	32,117,000	29,745,000	31,493,000	31,158,000	31,378,000	28,977,000	28,988,000	1,589,000	1,587,000	1,586,000	1,584,000	1,582,000	1,581,000	1,578,000	1,575,000	1,747,000	1,757,000	1,818,000	1,873,000	1,933,000	1,990,000	2,044,000	1,969,000	1,914,000	1,859,000	1,803,000	1,746,000	1,689,000	1,645,000	1,586,000	1,485,000	1,424,000	1,330,000	1,309,000	1,294,000	1,277,000	1,245,000	1,254,000	1,315,000	1,235,000
long-term deferred revenue and customer deposits	151,311,000	151,842,000	147,510,000	127,070,000	115,825,000	120,638,000	130,212,000	124,619,000	119,305,000	122,381,000	129,814,000	127,513,000	123,477,000	126,621,000	133,121,000	122,227,000	102,457,000	101,929,000	103,310,000	102,713,000	99,581,000	100,100,000	104,240,000	104,339,000	97,013,000	95,529,000	94,619,000	84,881,000	77,135,000	80,491,000	91,409,000	87,747,000	81,660,000	79,232,000	86,595,000	78,206,000	64,201,000	67,025,000	68,129,000	56,570,000	39,224,000
operating lease liabilities, net of current portion	33,539,000	30,650,000	32,509,000	31,798,000	33,527,000	35,231,000	38,101,000	40,898,000	43,654,000	46,404,000	48,819,000	49,582,000	48,839,000	51,409,000	53,927,000	55,671,000	56,144,000	58,579,000	61,267,000	63,814,000	66,673,000	69,355,000	70,658,000	67,814,000	68,112,000	70,582,000
total liabilities	602,632,000	609,875,000	626,183,000	654,162,000	611,284,000	653,420,000	703,237,000	685,896,000	658,041,000	699,387,000	790,911,000	898,959,000	884,407,000	909,746,000	1,134,314,000	1,085,962,000	1,017,394,000	1,030,099,000	1,079,259,000	1,168,088,000	1,138,231,000	1,137,710,000	1,182,584,000	1,164,532,000	1,129,110,000	1,182,566,000	1,204,561,000	1,253,907,000	1,206,407,000	1,232,407,000	1,299,826,000	1,027,671,000	1,085,568,000	1,092,311,000	1,165,263,000	1,115,012,000	1,085,833,000	1,102,806,000	1,149,461,000	1,105,817,000	1,030,451,000	195,358,000	233,299,000	206,810,000	178,919,000	175,511,000	198,602,000	182,279,000	158,614,000	166,204,000	180,273,000	171,778,000	209,450,000	214,644,000	225,388,000	205,197,000	184,842,000	183,529,000	208,011,000	200,661,000	192,064,000	196,654,000	215,758,000	207,156,000	187,455,000	194,796,000	211,003,000	215,469,000	197,325,000	215,137,000	223,604,000	210,603,000	44,660,000	42,068,000	42,012,000	37,340,000	36,389,000	38,005,000	39,164,000	34,752,000	31,904,000	32,079,000	30,838,000	28,088,000	25,428,000	26,700,000	26,069,000
commitments and contingencies
stockholders' equity:
preferred stock, 0.001 par value, 5,000,000 authorized; none issued and outstanding
common stock	136,000	135,000	134,000				131,000				128,000				126,000				124,000				122,000				120,000				117,000				116,000				114,000				51,000				50,000			49,000	49,000				48,000		48,000	48,000	47,000	47,000	47,000	47,000	46,000	45,000	45,000	45,000	45,000		44,000	44,000			37,000	37,000	36,000	36,000	36,000	36,000		35,000	35,000	35,000		35,000	35,000	35,000		34,000
additional paid-in capital	3,293,220,000	3,274,682,000	3,255,333,000	3,234,959,000	3,221,213,000	3,201,998,000	3,181,366,000	3,158,283,000	3,142,712,000	3,118,798,000	3,099,698,000	3,077,866,000	3,015,644,000	2,993,163,000	3,023,403,000	3,003,679,000	2,991,704,000	2,968,631,000	2,955,400,000	2,936,573,000	2,924,757,000	2,903,055,000	2,891,553,000	2,873,702,000	2,863,003,000	2,841,001,000	2,828,922,000	2,809,901,000	2,796,695,000	2,676,382,000	2,665,120,000	2,735,387,000	2,723,693,000	2,703,275,000	2,693,846,000	2,676,852,000	2,666,997,000	2,650,315,000	2,642,745,000	2,627,807,000	2,619,418,000	302,456,000	298,101,000	292,059,000	287,795,000	278,106,000	273,574,000	267,649,000	263,887,000	256,762,000	253,202,000	248,694,000	245,882,000	239,455,000	237,289,000	232,969,000	231,485,000	229,515,000	227,201,000	219,298,000	213,347,000	210,843,000	209,146,000	200,925,000	196,957,000	194,632,000	192,844,000	189,491,000	188,068,000	185,496,000	182,789,000	180,882,000	124,260,000	122,720,000	122,074,000	120,394,000	118,445,000	117,494,000	120,057,000	115,435,000	114,338,000	114,158,000	112,286,000	112,236,000	111,474,000	111,341,000	110,683,000	110,101,000
accumulated other comprehensive income	3,954,000	4,337,000	4,073,000	3,120,000	4,151,000	3,404,000	3,572,000	5,870,000	5,379,000	5,803,000	5,738,000	-353,000	-1,056,000	-147,000	141,000					262,000			-3,160,000				-2,639,000	-608,000	555,000	-107,000	2,895,000	46,000											-4,645,000	-1,552,000	196,000	2,416,000	2,772,000	2,521,000	2,082,000	878,000	671,000	1,450,000	793,000	-936,000	212,000												-1,461,000	-635,000			246,000	94,000											-130,000	-107,000	-77,000	-123,000	7,000	-11,000
treasury stock	-1,701,464,000	-1,683,481,000	-1,654,702,000	-1,654,569,000	-1,654,239,000	-1,652,642,000	-1,615,483,000	-1,615,279,000	-1,596,026,000	-1,559,534,000	-1,546,128,000	-1,545,922,000	-1,497,886,000	-1,489,687,000	-1,373,840,000	-1,373,394,000	-1,362,141,000	-1,327,273,000	-1,322,496,000	-1,321,978,000	-1,318,535,000	-1,309,038,000	-1,305,935,000	-1,255,675,000	-1,230,440,000	-1,155,252,000	-1,119,063,000	-1,104,042,000	-1,102,481,000	-999,329,000	-995,843,000	-783,878,000	-781,948,000	-676,302,000	-570,921,000	-569,499,000	-564,581,000	-531,434,000	-481,366,000	-381,942,000	-354,511,000	-172,683,000	-169,516,000	-149,345,000	-148,696,000	-129,989,000	-117,802,000	-108,513,000	-99,829,000	-90,950,000	-83,480,000		-70,173,000	-62,445,000	-56,032,000	-53,376,000	-53,234,000	-36,863,000	-35,437,000	-32,139,000	-31,981,000	-31,870,000	-31,691,000	-28,939,000	-28,939,000	-28,939,000	-28,939,000	-28,939,000	-28,939,000	-28,939,000	-28,939,000	-28,939,000	-28,939,000	-28,939,000	-28,939,000		-27,473,000	-26,490,000	-26,490,000	-26,490,000	-26,490,000	-26,490,000	-26,490,000	-26,490,000	-26,490,000	-26,490,000	-26,490,000	-26,490,000
accumulated deficit	-22,294,000	-48,122,000
total stockholders' equity	1,573,552,000	1,547,551,000	1,560,395,000	1,520,583,000	1,459,388,000	1,431,996,000	1,892,065,000	1,903,903,000	2,039,670,000	2,031,210,000	2,029,649,000	2,005,153,000	1,937,646,000	1,906,889,000		2,047,587,000	1,999,004,000	2,002,955,000		1,978,235,000	1,939,320,000	1,929,817,000		1,962,807,000	1,940,264,000	2,011,435,000		2,043,477,000	2,036,598,000	2,045,201,000		2,331,348,000	2,232,357,000
total liabilities and stockholders' equity	2,176,184,000	2,157,426,000	2,186,578,000	2,174,745,000	2,070,672,000	2,085,416,000	2,595,302,000	2,589,799,000	2,697,711,000	2,730,597,000	2,820,560,000	2,904,112,000	2,822,053,000	2,816,635,000		3,133,549,000	3,016,398,000	3,033,054,000		3,146,323,000	3,077,551,000	3,067,527,000		3,127,339,000	3,069,374,000	3,194,001,000		3,297,384,000	3,243,005,000	3,277,608,000		3,359,019,000	3,317,925,000
accounts receivable and unbilled costs, net of allowance for credit losses of 92 and 214 at june 30, 2025 and march 31, 2025, respectively		92,200,000
preferred stock, 0.001 par value:5,000,000 shares authorized; no shares issued or outstanding at june 30, 2025 and march 31, 2025
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 214 and 479 at march 31, 2025 and 2024, respectively			163,654,000
long-term debt				75,000,000	75,000,000	75,000,000	100,000,000	100,000,000	100,000,000	100,000,000	100,000,000	200,000,000	200,000,000	200,000,000	350,000,000	350,000,000	350,000,000	350,000,000	350,000,000	450,000,000	450,000,000	450,000,000	450,000,000	450,000,000	450,000,000	500,000,000	550,000,000	600,000,000	600,000,000	600,000,000	600,000,000	300,000,000	300,000,000	300,000,000	300,000,000	300,000,000	300,000,000	300,000,000	300,000,000	250,000,000	250,000,000											0	62,000,000
stockholders’ equity:
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2025 and 2024
(accumulated deficit) retained earnings			-44,443,000	-63,060,000	-111,870,000	-120,897,000
accounts receivable and unbilled costs, net of allowance for credit allowances of 85 and 479 at december 31, 2024 and march 31, 2024, respectively				214,585,000
preferred stock, 0.001 par value:
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2024 and march 31, 2024
300,000,000 shares authorized; 133,718,142 and 131,316,309 shares issued and 71,745,945 and 71,404,216 shares outstanding at december 31, 2024 and march 31, 2024, respectively				133,000
accounts receivable and unbilled costs, net of allowance for credit allowances of 64 and 479 at september 30, 2024 and march 31, 2024, respectively					118,632,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2024 and march 31, 2024
300,000,000 shares authorized; 133,671,490 and 131,316,309 shares issued and 71,715,229 and 71,404,216 shares outstanding at september 30, 2024 and march 31, 2024, respectively					133,000
accounts receivable and unbilled costs, net of allowance for credit allowances of 116 and 479 at june 30, 2024 and march 31, 2024, respectively						129,270,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2024 and march 31, 2024
300,000,000 shares authorized; 133,189,228 and 131,316,309 shares issued and 71,311,409 and 71,404,216 shares outstanding at june 30, 2024 and march 31, 2024, respectively						133,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 479 and 675 at march 31, 2024 and 2023, respectively							192,096,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2024 and 2023
retained earnings							322,479,000	354,898,000	487,475,000	466,013,000	470,213,000	473,434,000	420,816,000	403,433,000	410,565,000	418,971,000	371,246,000	363,350,000	374,691,000	363,254,000	334,233,000	337,919,000	355,339,000	348,003,000	311,278,000	328,750,000	358,093,000	338,107,000	341,710,000	368,138,000	396,493,000	379,676,000	289,991,000	292,459,000	316,681,000	294,371,000	273,126,000	274,392,000	283,390,000	287,006,000	311,513,000	319,428,000	311,759,000	290,905,000	273,276,000	262,043,000	250,567,000	233,891,000	216,597,000	206,714,000	201,461,000	186,908,000	175,770,000	165,860,000	160,852,000	147,905,000	137,874,000	130,823,000	128,424,000	117,653,000	106,552,000	98,304,000	91,159,000	84,106,000	75,565,000	68,479,000	63,242,000	57,568,000	49,633,000	44,691,000	43,194,000	48,107,000	51,213,000	47,962,000	45,282,000	43,204,000	41,220,000	38,919,000	37,545,000	35,741,000	33,854,000	32,400,000	31,748,000	31,138,000	30,232,000	29,175,000	28,878,000	29,055,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,076 and 675 at december 31, 2023 and march 31, 2023, respectively								221,574,000
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2023 and march 31, 2023
300,000,000 shares authorized; 130,922,477 and 128,683,824 shares issued and 71,019,904 and 71,249,045 shares outstanding at december 31, 2023 and march 31, 2023, respectively								131,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 666 and 675 at september 30, 2023 and march 31, 2023, respectively									152,603,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2023 and march 31, 2023
300,000,000 shares authorized; 130,875,398 and 128,683,824 shares issued and 71,697,901 and 71,249,045 shares outstanding at september 30, 2023 and march 31, 2023, respectively									130,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 666 and 675 at june 30, 2023 and march 31, 2023, respectively										108,292,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2023 and march 31, 2023
300,000,000 shares authorized; 130,016,041 and 128,683,824 shares issued and 72,146,090 and 71,249,045 shares outstanding at june 30, 2023 and march 31, 2023, respectively										130,000
marketable securities											32,204,000	57,262,000	46,806,000	42,144,000	67,037,000	5,349,000	7,347,000	6,737,000	9,277,000	12,689,000	12,127,000	23,202,000	47,969,000	56,274,000	55,129,000	84,354,000	76,344,000	105,753,000	119,935,000	105,637,000	77,941,000	47,895,000	55,582,000	138,719,000	137,892,000	114,870,000	99,297,000	108,743,000	128,003,000	127,751,000	103,138,000	112,857,000	101,392,000	87,967,000	90,783,000	88,890,000	75,234,000	56,343,000	42,094,000	46,333,000	37,338,000	35,324,000	69,604,000	74,517,000	79,617,000	61,167,000	68,520,000	142,319,000	133,430,000	64,407,000	53,261,000	63,513,000	69,875,000	49,412,000	29,232,000	37,032,000	24,162,000	25,353,000	13,053,000	8,556,000	10,465,000	29,237,000	70,856,000	80,530,000		14,130,000	31,247,000	32,761,000	19,810,000	18,043,000	38,796,000	43,786,000	26,793,000	39,842,000	34,416,000	40,443,000	50,432,000	38,028,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 675 and 1,649 at march 31, 2023 and 2022, respectively											143,855,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2023 and 2022
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,002 and 1,649 at december 31, 2022 and march 31, 2022, respectively												215,838,000
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2022 and march 31, 2022
300,000,000 shares authorized; 128,389,414 and 126,425,383 shares issued and 70,961,344 and 74,102,293 shares outstanding at december 31, 2022 and march 31, 2022, respectively												128,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,903 and 1,649 at september 30, 2022 and march 31, 2022, respectively													139,126,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2022 and march 31, 2022
300,000,000 shares authorized; 128,373,156 and 126,425,383 shares issued and 72,243,650 and 74,102,293 shares outstanding at september 30, 2022 and march 31, 2022, respectively													128,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,614 and 1,649 at june 30, 2022 and march 31, 2022, respectively														112,889,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2022 and march 31, 2022
300,000,000 shares authorized; 127,371,813 and 126,425,383 shares issued and 71,483,821 and 74,102,293 shares outstanding at june 30, 2022 and march 31, 2022, respectively														127,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,649 and 416 at march 31, 2022 and 2021, respectively															148,245,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2022 and 2021
total stockholders’ equity															2,060,395,000				2,005,779,000				1,937,919,000				2,065,433,000				2,068,782,000			2,317,519,000	2,436,250,000	2,397,885,000	2,373,952,000	2,391,652,000	2,443,382,000	2,529,297,000	2,573,620,000	446,394,000	435,750,000	432,118,000	412,622,000	412,626,000	409,161,000	395,598,000	382,787,000	373,453,000	371,903,000	360,342,000	352,321,000	341,982,000	342,369,000	325,695,000	315,309,000	322,941,000	319,559,000	303,747,000	287,106,000	275,792,000	266,843,000	254,320,000		232,619,000	225,731,000	217,529,000	207,266,000	200,396,000	197,333,000	200,187,000	146,568,000	141,717,000	138,407,000	135,690,000	132,168,000	129,825,000	126,591,000	123,979,000	120,884,000	119,298,000	117,449,000	116,812,000	115,174,000	113,938,000	113,112,000	112,663,000
total liabilities and stockholders’ equity															3,194,709,000				3,085,038,000				3,120,503,000				3,269,994,000				3,368,608,000			3,409,830,000	3,601,513,000	3,512,897,000	3,459,785,000	3,494,458,000	3,592,843,000	3,635,114,000	3,604,071,000	641,752,000	669,049,000	638,928,000	591,541,000	588,137,000	607,763,000	577,877,000	541,401,000	539,657,000	552,176,000	532,120,000	561,771,000	556,626,000	567,757,000	530,892,000	500,151,000	506,470,000	527,570,000	504,408,000	479,170,000	472,446,000	482,601,000	461,476,000	429,518,000	427,415,000	436,734,000	432,998,000	404,591,000	415,533,000	420,937,000	410,790,000	191,228,000	183,785,000	180,419,000	173,030,000	168,557,000	167,830,000	165,755,000	158,731,000	152,788,000	151,377,000	148,287,000	144,900,000	140,602,000	140,638,000	139,181,000	135,126,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 220 and 416 at december 31, 2021 and march 31, 2021, respectively																233,854,000
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2021 and march 31, 2021
300,000,000 shares authorized; 126,137,308 and 124,197,974 shares issued and 73,828,546 and 73,751,615 shares outstanding at december 31, 2021 and march 31, 2021, respectively																126,000
accumulated other comprehensive loss																-1,795,000	-1,931,000	-1,877,000	-1,940,000		-1,258,000	-2,241,000		-3,345,000	-3,699,000	-3,184,000							505,000	-2,029,000	-3,472,000	-3,955,000	-1,705,000	-1,735,000	-1,501,000	-3,688,000	-2,914,000	-2,858,000														-1,851,000	-864,000	-582,000	-676,000	-1,112,000	-859,000	-1,532,000	-1,817,000	-1,817,000	-1,565,000	-1,598,000							-3,000	-63,000		-54,000	-60,000	-134,000	-122,000	-104,000	-114,000	-92,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 398 and 416 at september 30, 2021 and march 31, 2021, respectively																	162,888,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2021 and march 31, 2021
300,000,000 shares authorized; 126,108,858 and 124,197,974 shares issued and 74,217,661 and 73,751,615 shares outstanding at september 30, 2021 and march 31, 2021, respectively																	126,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 407 and 416 at june 30, 2021 and march 31, 2021, respectively																		146,199,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2021 and march 31, 2021
300,000,000 shares authorized; 124,694,737 and 124,197,974 shares issued and 74,084,245 and 73,751,615 shares outstanding at june 30, 2021 and march 31, 2021, respectively																		124,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 416 and 1,350 at march 31, 2021 and 2020, respectively																			197,717,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2021 and 2020
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 719 and 1,350 at december 31, 2020 and march 31, 2020, respectively																				208,016,000
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2020 and march 31, 2020
300,000,000 shares authorized; 123,867,373 and 122,006,077 shares issued and 73,438,024 and 72,220,906 shares outstanding at december 31, 2020 and march 31, 2020, respectively																				124,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 782 and 1,350 at september 30, 2020 and march 31, 2020, respectively																					169,687,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2020 and march 31, 2020
300,000,000 shares authorized; 123,840,945 and 122,006,077 shares issued and 73,574,035 and 72,220,906 shares outstanding at september 30, 2020 and march 31, 2020, respectively																					123,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 853 and 1,350 at june 30, 2020 and march 31, 2020, respectively																						138,793,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2020 and march 31, 2020
300,000,000 shares authorized; 122,353,504 and 122,006,077 shares issued and 72,455,170 and 72,220,906 shares outstanding at june 30, 2020 and march 31, 2020, respectively																						122,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,350 and 1,583 at march 31, 2020 and 2019, respectively																							213,514,000
liabilities and stockholders’ equity
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2020 and 2019
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,728 and 1,583 at december 31, 2019 and march 31, 2019, respectively																								244,877,000
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2019 and march 31, 2019
300,000,000 shares authorized; 121,679,117 and 119,760,132 shares issued and 73,855,221 and 77,610,361 shares outstanding at december 31, 2019 and march 31, 2019, respectively																								122,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 2,280 and 1,583 at september 30, 2019 and march 31, 2019, respectively																									202,288,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2019 and march 31, 2019
300,000,000 shares authorized; 121,648,747 and 119,760,132 shares issued and 74,838,047 and 77,610,361 shares outstanding at september 30, 2019 and march 31, 2019, respectively																									122,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,690 and 1,583 at june 30, 2019 and march 31, 2019, respectively																										160,039,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2019 and march 31, 2019
300,000,000 shares authorized; 120,123,018 and 119,760,132 shares issued and 76,554,298 and 77,610,361 shares outstanding at june 30, 2019 and march 31, 2019, respectively																										120,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,583 and 1,991 at march 31, 2019 and 2018, respectively																											235,318,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2019 and 2018
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,705 and 1,991 at december 31, 2018 and march 31, 2018, respectively																												247,690,000
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2018 and march 31, 2018
300,000,000 shares authorized; 119,417,029 and 117,744,913 shares issued and 77,831,786 and 80,270,023 shares outstanding at december 31, 2018 and march 31, 2018, respectively																												119,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,209 and 1,991 at september 30, 2018 and march 31, 2018, respectively																													184,156,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2018 and march 31, 2018
300,000,000 shares authorized; 119,231,287 and 117,744,913 shares issued and 77,704,724 and 80,270,023 shares outstanding at september 30, 2018 and march 31, 2018, respectively																													119,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,473 and 1,991 at june 30, 2018 and march 31, 2018, respectively																														165,331,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2018 and march 31, 2018
300,000,000 shares authorized; 118,139,282 and 117,744,913 shares issued and 80,535,277 and 80,270,023 shares outstanding at june 30, 2018 and march 31, 2018, respectively																														117,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,991 and 2,066 at march 31, 2018 and 2017, respectively																															213,438,000
contingent liabilities, net of current portion																																			4,789,000				4,636,000	4,598,000	4,560,000	4,521,000	4,484,000	4,445,000	4,407,000	4,369,000	4,291,000	4,219,000	4,139,000	4,068,000	4,248,000	2,370,000	3,102,000	3,657,000	4,828,000	4,986,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2018 and 2017
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,675 and 2,066 at december 31, 2017 and march 31, 2017, respectively																																249,939,000
contingent liabilities																																	4,865,000	4,827,000		4,750,000	4,712,000	4,674,000
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2017 and march 31, 2017
300,000,000 shares authorized; 117,331,491 and 115,917,431 shares issued and 87,267,106 and 92,041,288 shares outstanding at december 31, 2017 and march 31, 2017, respectively																																117,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,689 and 2,066 at september 30, 2017 and march 31, 2017, respectively																																	215,227,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2017 and march 31, 2017
300,000,000 shares authorized; 117,137,727 and 115,917,431 shares issued and 87,140,939 and 92,041,288 shares outstanding at september 30, 2017 and march 31, 2017, respectively																																	116,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 1,186 and 2,066 at june 30, 2017 and march 31, 2017, respectively																																		185,881,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2017 and march 31, 2017
300,000,000 shares authorized; 116,342,146 and 115,917,431 shares issued and 89,538,391 and 92,041,288 shares outstanding at june 30, 2017 and march 31, 2017, respectively																																		116,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 2,066 and 5,069 at march 31, 2017 and 2016, respectively																																			294,374,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2017 and 2016
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 8,753 and 5,069 at december 31, 2016 and march 31, 2016, respectively																																				284,055,000
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2016 and march 31, 2016
300,000,000 and 150,000,000 shares authorized; 115,620,378 and 114,495,614 shares issued and 91,786,929 and 94,088,469 shares outstanding at december 31, 2016 and march 31, 2016, respectively																																				116,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 6,838 and 5,069 at september 30, 2016 and march 31, 2016, respectively																																					240,599,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2016 and march 31, 2016
300,000,000 and 150,000,000 shares authorized; 115,416,135 and 114,495,614 shares issued and 91,752,414 and 94,088,469 shares outstanding at september 30, 2016 and march 31, 2016, respectively																																					115,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 6,212 and 5,069 at june 30, 2016 and march 31, 2016, respectively																																						196,227,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2016 and march 31, 2016
150,000,000 shares authorized; 114,503,040 and 114,495,614 shares issued and 91,992,604 and 94,088,469 shares outstanding at june 30, 2016 and march 31, 2016, respectively																																						114,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 5,069 and 173 at march 31, 2016 and 2015, respectively																																							247,199,000
inventories																																							58,029,000	63,427,000	71,066,000	12,710,000	12,130,000	10,274,000	14,505,000	11,026,000	12,580,000	11,128,000	10,728,000	10,940,000	7,563,000	7,427,000	8,343,000	7,494,000	8,021,000	9,414,000	8,963,000	9,591,000	8,925,000	8,948,000	11,412,000	9,964,000	9,181,000	8,728,000	7,414,000	7,260,000	6,850,000	7,955,000	7,285,000	12,590,000	12,083,000	10,197,000	4,846,000	4,932,000	4,562,000	4,426,000	4,323,000	4,386,000	2,816,000	4,121,000	4,514,000	3,123,000	3,114,000	3,113,000	2,949,000	2,985,000	3,366,000	2,973,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2016 and 2015
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 4,720 and 173 at december 31, 2015 and march 31, 2015, respectively																																								244,957,000
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2015 and march 31, 2015
150,000,000 shares authorized; 114,075,319 and 50,812,548 shares issued and 98,570,412 and 40,807,805 shares outstanding at december 31, 2015 and march 31, 2015, respectively																																								114,000
accounts receivable and unbilled costs, net of allowance for doubtful accounts of 8,984 and 173 at september 30, 2015 and march 31, 2015, respectively																																									165,092,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2015 and march 31, 2015
150,000,000 shares authorized; 113,858,772 and 50,812,548 shares issued and 99,131,910 and 40,807,805 shares outstanding at september 30, 2015 and march 31, 2015, respectively																																									114,000
accounts receivable																																										58,496,000	82,226,000	83,415,000	49,786,000	32,955,000	60,518,000	74,263,000	55,672,000	50,922,000	73,900,000	61,908,000	28,895,000	38,809,000	69,795,000	49,593,000	49,677,000	41,361,000	62,801,000	56,792,000	41,448,000	40,318,000	65,556,000	57,650,000	33,159,000	29,016,000	39,827,000	45,979,000	25,906,000	26,433,000	32,048,000	48,517,000	18,709,000	15,894,000	18,317,000	16,468,000	17,913,000	15,021,000	16,765,000	18,998,000	12,204,000	11,107,000	11,886,000	13,172,000	9,653,000	11,521,000	10,851,000	9,486,000
deferred revenue																																										108,179,000	123,422,000	107,595,000	95,022,000	101,871,000	109,301,000	102,010,000	88,319,000	93,749,000	95,055,000	90,567,000	79,750,000	88,759,000	93,493,000	82,802,000	77,376,000	78,618,000	85,241,000	80,384,000	71,810,000	75,670,000	84,196,000	72,584,000	61,937,000	66,279,000	70,815,000	69,330,000	58,731,000	73,651,000	74,257,000	51,929,000	22,365,000	24,234,000		21,369,000	20,250,000	21,747,000	21,382,000	18,265,000	16,272,000	17,425,000	17,680,000	15,751,000	14,832,000	15,536,000	15,968,000	14,619,000
long-term deferred revenue																																										27,919,000	26,961,000	27,036,000	22,540,000	22,848,000	24,639,000	22,285,000	21,294,000	24,087,000	25,907,000	22,717,000	18,393,000	18,005,000	18,722,000	12,311,000	12,833,000	12,197,000	14,735,000	13,980,000	15,219,000	15,054,000	17,846,000	12,914,000	8,572,000	8,958,000	8,937,000	7,476,000	6,407,000	7,008,000	6,764,000	6,530,000	3,223,000	1,332,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2015 and march 31, 2015
150,000,000 shares authorized; 50,834,158 and 50,812,548 shares issued and 40,752,954 and 40,807,805 shares outstanding at june 30, 2015 and march 31, 2015, respectively																																										51,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2015 and 2014
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2014 and march 31, 2014
150,000,000 shares authorized; 50,717,718 and 49,922,959 shares issued and 41,217,480 and 41,165,784 shares outstanding at december 31, 2014 and march 31, 2014, respectively																																												51,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2014 and march 31, 2014
150,000,000 shares authorized; 50,665,227 and 49,922,959 shares issued and 41,181,526 and 41,165,784 shares outstanding at september 30, 2014 and march 31, 2014, respectively																																													51,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2014 and march 31, 2014
150,000,000 shares authorized; 50,111,676 and 49,922,959 shares issued and 41,042,273 and 41,165,784 shares outstanding at june 30, 2014 and march 31, 2014, respectively																																														50,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2014 and 2013
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2013 and march 31, 2013																																																0
150,000,000 shares authorized; 49,826,807 and 49,007,491 shares issued and 41,326,074 and 41,466,921 shares outstanding at december 31, 2013 and march 31, 2013, respectively																																																50,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2013 and march 31, 2013																																																	0
150,000,000 shares authorized; 49,706,643 and 49,007,491 shares issued and 41,504,713 and 41,466,921 shares outstanding at september 30, 2013 and march 31, 2013, respectively																																																	50,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at june 30, 2013 and march 31, 2013																																																		0
current portion of contingent liabilities																																																			1,229,000	4,224,000	3,775,000	3,775,000	3,774,000	3,014,000
long-term debt, net of current portion																																																			0			62,000,000	62,000,000	62,000,000	45,606,000	49,356,000	53,106,000	56,856,000	60,606,000	64,356,000	68,106,000	71,856,000	74,356,000	76,856,000	82,500,000	85,000,000	87,500,000	90,000,000	92,500,000	95,000,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2013 and 2012																																																			0
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2012 and march 31, 2012																																																				0
150,000,000 shares authorized; 48,887,013 and 48,185,731 shares issued and 41,604,647 and 41,814,191 shares outstanding at december 31, 2012 and march 31, 2012, respectively																																																				49,000
march 31, 2012, respectively																																																				-76,759,000
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2012 and march 31, 2012																																																					0
150,000,000 shares authorized; 48,802,859 and 48,185,731 shares issued and 41,788,722 and 41,814,191 shares outstanding at september 30, 2012 and march 31, 2012, respectively																																																					49,000
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2012 and march 31, 2012																																																						0
150,000,000 shares authorized; 48,401,084 and 48,185,731 shares issued and 41,709,141 and 41,814,191 shares outstanding at june 30, 2012 and march 31, 2012, respectively																																																						48,000
current portion of long-term debt																																																							0	0	15,000,000	15,000,000	15,000,000	15,000,000	13,750,000	12,500,000	11,250,000	10,000,000	10,000,000	13,144,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2012 and 2011																																																							0
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2011 and march 31, 2011																																																								0
150,000,000 shares authorized; 47,778,373 and 47,441,879 shares issued and 41,534,672 and 42,557,221 shares outstanding at december 31, 2011 and march 31, 2011, respectively																																																								48,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at september 30, 2011 and march 31, 2011																																																									0
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at june 30, 2011 and march 31, 2011																																																										0
acquired intangible assets																																																											47,686,000	49,158,000	50,630,000	52,101,000	53,573,000	55,154,000	56,639,000	58,125,000	59,610,000	61,095,000	62,581,000	64,066,000	65,569,000	67,159,000	226,000	331,000		586,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2011 and 2010
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at december 31, 2010 and march 31, 2010
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at september 30, 2010 and march 31, 2010
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at june 30, 2010 and march 31, 2010
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2010 and 2009
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at december 31, 2009 and march 31, 2009
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at september 30, 2009 and march 31, 2009
total stockholder’s equity																																																																	242,063,000
refundable income taxes																																																																		6,650,000	8,389,000	5,751,000	5,723,000	5,629,000	5,036,000	1,278,000	309,000	284,000	657,000	300,000	198,000	202,000	985,000	1,319,000	1,419,000	1,477,000	1,399,000	1,231,000	1,411,000	2,172,000	2,102,000	1,935,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at june 30, 2009 and march 31, 2009
long-term debt, current portion																																																																			10,000,000	10,000,000	8,750,000	7,500,000	6,250,000	5,000,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2009 and 2008
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2008 and march 31, 2008
150,000,000 shares authorized; 43,890,018 and 43,370,802 shares issued and 39,358,001 and 38,838,785 shares outstanding at december 31, 2008 and march 31, 2008, respectively																																																																				44,000
deferred financing costs																																																																					829,000	892,000	956,000	952,000
restricted cash																																																																					122,000	121,000	121,000	156,000						1,342,000	1,339,000	1,337,000	1,334,000	1,332,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at september 30, 2008 and march 31, 2008
accumulated other comprehensive gain																																																																					-1,540,000	-896,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at june 30, 2008 and march 31, 2008
capitalized software development costs																																																																							7,000	48,000	89,000	129,000	170,000	211,000	252,000	293,000	312,000	84,000		55,000	221,000	387,000	552,000	718,000	884,000	1,049,000
5,000,000 shares authorized; no shares issued or outstanding at march 31, 2008 and 2007
150,000,000 shares authorized; 43,370,802 and 36,581,852 shares issued and 38,838,785 and 32,049,835 shares outstanding at march 31, 2008 and 2007, respectively																																																																							43,000
accrued other liabilities																																																																								9,429,000	3,690,000	2,467,000
5,000,000 shares authorized; no shares issued or outstanding at december 31, 2007 and march 31, 2007
150,000,000 shares authorized; 43,127,118 and 36,581,852 shares issued and 38,595,101 and 32,049,835 shares outstanding at december 31, 2007 and march 31, 2007, respectively																																																																								43,000
commitments and contingencies (note 7) stockholders’ equity:
5,000,000 shares authorized; no shares issued or outstanding at september 30, 2007 and march 31, 2007
5,000,000 shares authorized; no shares issued or outstanding at june 30, 2007 and march 31, 2007
cash and cash equivalents.																																																																											18,925,000
marketable securities.																																																																											69,204,000
deferred income taxes.																																																																											2,535,000
prepaid expenses and other current assets.																																																																											3,380,000
total current assets.																																																																											117,580,000
fixed assets, net.																																																																											8,262,000
acquired intangible assets, net.																																																																											442,000
long-term marketable securities.																																																																											11,975,000
other assets.																																																																											47,000
accounts payable.																																																																											3,023,000
accrued compensation.																																																																											8,271,000
accrued other.																																																																											2,609,000
deferred acquisition payment.
deferred revenue.																																																																											23,992,000
total current liabilities.																																																																											38,087,000
accrued long-term retirement benefits (note 16).																																																																											1,155,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at march 31, 2007 and 2006
accumulated other comprehensive loss.																																																																											-46,000
deferred compensation																																																																															-4,434,000	-638,000	-739,000	-713,000						-26,000
deferred acquisition payment																																																																														1,342,000	1,339,000	1,337,000	1,334,000	1,332,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at december 31, 2006 and march 31, 2006
2006, respectively																																																																												-27,890,000
other intangible assets																																																																													729,000	872,000	1,015,000	1,159,000	1,302,000	1,446,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at september 30, 2006 and march 31, 2006
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at june 30, 2006 and march 31, 2006
prepaids and other current assets																																																																															3,119,000		2,098,000	2,954,000	3,003,000	2,486,000	2,706,000	2,283,000	2,175,000	2,037,000
5,000,000 shares authorized; no shares issued or outstanding at march 31, 2006 and 2005
150,000,000 shares authorized; 35,488,019 and 34,892,273 shares issued and 31,284,796 and 30,689,050 shares outstanding at march 31, 2006 and 2005, respectively																																																																															35,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at december 31, 2005 and march 31, 2005
total long term liabilities																																																																																	2,493,000	2,608,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at september 30, 2005 and march 31, 2005
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at june 30, 2005 and march 31, 2005
5,000,000 shares authorized; no shares issued or outstanding at march 31, 2005 and 2004
150,000,000 shares authorized; 34,892,273 and 34,584,577 shares issued and 30,689,050 and 30,381,354 shares outstanding at march 31, 2005 and 2004, respectively																																																																																			35,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at december 31, 2004 and march 31, 2004
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at september 30, 2004 and march 31, 2004
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at june 30, 2004 and march 31, 2004
5,000,000 shares authorized; no shares issued or outstanding at march 31, 2004 and 2003
150,000,000 shares authorized; 34,584,577 and 34,151,894 shares issued and 30,381,354 and 29,982,671 shares outstanding at march 31, 2004 and 2003, respectively																																																																																							34,000
preferred stock, 0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at december 31, 2003 and march 31,2003

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