Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022
Current assets:
Cash and cash equivalents	$ 182,335	$ 132,818
Short-term marketable securities	638,037	625,789
Accounts receivable, net	94,475	90,608
Inventories, net	102,237	93,981
Prepaid expenses and other current assets	45,714	33,277
Total current assets	1,062,798	976,473
Long-term marketable securities	116,871	220,089
Property and equipment, net	195,157	202,490
Goodwill	72,960	76,786
Other intangibles, net	36,833	39,518
Deferred tax assets	18,881	10,552
Other assets	193,044	147,485
Total assets	1,696,544	1,673,393
Current liabilities:
Accounts payable	35,070	35,346
Accrued expenses	69,434	72,629
Deferred revenue	25,962	26,362
Other current liabilities	3,594	4,120
Total current liabilities	134,060	138,457
Other long-term liabilities	7,013	9,319
Contingent consideration	14,995	21,510
Deferred tax liabilities	689	781
Total liabilities	156,757	170,067
Commitments and contingencies (Note 16)
Stockholders' equity:
Class B Preferred Stock, $.01 par value Authorized - 1,000,000 shares; Issued and outstanding - none
Common stock, $.01 par value 100,000 shares authorized; 48,418 and 48,258 shares issued as of September 31, 2022 and March 31, 2022, respectively 45,172 and 45,545 shares outstanding as of September 30, 2022 and March 31, 2022, respectively	452	455
Additional paid in capital	904,755	870,074
Retained earnings	1,125,199	964,512
Treasury stock at cost - 3,246 and 2,713 shares as of September 31, 2022 and March 31, 2022, respectively	(443,974)	(304,555)
Accumulated other comprehensive loss	(46,645)	(27,160)
Total stockholders' equity	1,539,787	1,503,326
Total liabilities and stockholders' equity	$ 1,696,544	$ 1,673,393