CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016
Current assets:
Cash and cash equivalents	$ 38,274	$ 48,231
Short-term marketable securities	184,900	163,822
Accounts receivable, net	41,280	42,821
Inventories	29,093	26,740
Prepaid expenses and other current assets	6,741	6,778
Total current assets	300,288	288,392
Long-term marketable securities		1,000
Property and equipment, net	25,950	23,184
Goodwill	32,272	33,003
In-process research and development	15,055	15,396
Long-term deferred tax assets, net	51,296	58,534
Other assets	4,451	4,422
Total assets	429,312	423,931
Current liabilities:
Accounts payable	8,372	9,381
Accrued expenses	26,257	28,382
Deferred revenue	8,590	8,778
Total current liabilities	43,219	46,541
Other long-term liabilities	213	220
Contingent consideration	7,739	7,563
Long-term deferred tax liabilities	814	832
Total liabilities	51,985	55,156
Commitments and contingencies (Note 8)
Stockholders' equity:
Class B Preferred Stock, $.01 par value Authorized - 1,000,000 shares; Issued and outstanding - none
Common stock, $.01 par value Authorized - 100,000,000 shares; Issued - 44,543,177 shares at June 30, 2016 and 43,973,119 shares at March 31, 2016; Outstanding - 43,008,100 shares at June 30, 2016 and 42,596,228 shares at March 31, 2016	430	426
Additional paid in capital	520,842	508,624
Accumulated deficit	(86,165)	(99,075)
Treasury stock at cost - 1,535,077 shares at June 30, 2016 and 1,376,891 shares at March 31, 2016	(41,691)	(26,660)
Accumulated other comprehensive loss	(16,089)	(14,540)
Total stockholders' equity	377,327	368,775
Total liabilities and stockholders' equity	$ 429,312	$ 423,931