Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Current assets:
Cash and cash equivalents	$ 132,818	$ 232,710
Short-term marketable securities	625,789	350,985
Accounts receivable, net	90,608	97,179
Inventories, net	93,981	81,059
Prepaid expenses and other current assets	33,277	26,032
Total current assets	976,473	787,965
Long-term marketable securities	220,089	264,085
Property and equipment, net	202,490	197,129
Goodwill	76,786	78,568
Other intangibles, net	39,518	42,150
Deferred tax assets	(10,552)	(11,380)
Other assets	147,485	113,082
Total assets	1,673,393	1,494,359
Current liabilities:
Accounts payable	35,346	34,842
Accrued expenses	72,629	66,046
Deferred revenue	26,362	24,322
Other current liabilities	4,120	3,759
Total current liabilities	138,457	128,969
Other long-term liabilities	9,319	10,162
Contingent consideration	21,510	24,706
Deferred tax liabilities	781	847
Total liabilities	170,067	164,684
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; 48258 and 47,929 shares issued as of March 31, 2022 and 2021, respectively 45,545 and 45,271 shares outstanding as of March 31, 2022 and 2021, respectively	455	453
Additional paid in capital	870,074	800,690
Retained earnings	964,512	828,007
Treasury stock at cost 2,713 and 2,658 shares as of March 31, 2022 and 2021, respectively	(304,555)	(288,030)
Accumulated other comprehensive loss	(27,160)	(11,445)
Total stockholders' equity	1,503,326	1,329,675
Total liabilities and stockholders' equity	$ 1,673,393	$ 1,494,359