Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022
Current assets:
Cash and cash equivalents	$ 180,492	$ 132,818
Short-term marketable securities	663,829	625,789
Accounts receivable, net	91,102	90,608
Inventories, net	95,373	93,981
Prepaid expenses and other current assets	29,563	33,277
Total current assets	1,060,359	976,473
Long-term marketable securities	159,876	220,089
Property and equipment, net	198,478	202,490
Goodwill	74,855	76,786
Other intangibles, net	38,168	39,518
Deferred tax assets	17,096	10,552
Other assets	154,804	147,485
Total assets	1,703,636	1,673,393
Current liabilities:
Accounts payable	34,797	35,346
Accrued expenses	79,011	72,629
Deferred revenue	23,624	26,362
Other current liabilities	3,330	4,120
Total current liabilities	140,762	138,457
Other long-term liabilities	7,792	9,319
Contingent consideration	18,151	21,510
Deferred tax liabilities	735	781
Total liabilities	167,440	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; 48,229 and 47,929 shares issued as of December 31, 2021 and March 31, 2021, respectively 45,516 and 45,271 shares outstanding as of December 31, 2021 and March 31, 2021, respectively	456	455
Additional paid in capital	884,965	870,074
Retained earnings	1,019,066	964,512
Treasury stock at cost - 2,713 and 2,658 shares as of December 31, 2021 and March 31, 2021, respectively	(330,020)	(304,555)
Accumulated other comprehensive loss	(38,271)	(27,160)
Total stockholders' equity	1,536,196	1,503,326
Total liabilities and stockholders' equity	$ 1,703,636	$ 1,673,393