CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Mar. 31, 2015
Current assets:
Cash and cash equivalents	$ 54,421	$ 22,401
Short-term marketable securities	121,087	109,557
Accounts receivable, net	37,119	31,828
Inventories	23,032	16,774
Prepaid expenses and other current assets	4,030	4,479
Deferred tax assets, net	25,715	35,100
Total current assets	265,404	220,139
Long-term marketable securities		13,996
Property and equipment, net	11,420	9,127
Goodwill	32,676	31,534
In-Process Research and Development	15,243	14,711
Long-term deferred tax assets, net	44,240	45,206
Other assets	4,423	3,654
Total assets	373,406	338,367
Current liabilities:
Accounts payable	8,788	10,389
Accrued expenses	18,861	21,894
Deferred revenue	6,803	7,036
Total current liabilities	34,452	39,319
Other long-term liabilities	217	183
Contingent consideration	6,817	6,510
Long-term deferred tax liabilities	824	795
Total liabilities	$ 42,310	$ 46,807
Commitments and contingencies (Note 10)
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 - 43,756,550 shares at September 30, 2015 and 42,618,717 shares at March 31, 2015; Outstanding - 42,417,469 shares at September 30, 2015 and 41,335,773 shares at March 31, 2015	$ 424	$ 413
Additional paid in capital	489,463	465,046
Accumulated deficit	(120,628)	(137,222)
Treasury stock at cost - 1,339,081 shares at September 30, 2015 and 1,282,944 shares at March 31, 2015	(23,157)	(19,347)
Accumulated other comprehensive loss	(15,006)	(17,330)
Total stockholders' equity	331,096	291,560
Total liabilities and stockholders' equity	$ 373,406	$ 338,367