CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Mar. 31, 2014
Current assets:
Cash and cash equivalents	$ 17,483	$ 20,916
Short-term marketable securities	77,981	55,663
Accounts receivable, net	23,072	24,357
Inventories	13,445	13,948
Prepaid expenses and other current assets	3,310	3,082
Total current assets	135,291	117,966
Long-term marketable securities	16,473	41,761
Property and equipment, net	7,351	6,889
Goodwill	36,867	37,990
In-Process Research and Development	17,198
Long-term deferred tax assets	813
Other assets	1,551	801
Total assets	215,544	205,407
Current liabilities:
Accounts payable	7,616	7,746
Accrued expenses	13,762	17,899
Deferred revenue	5,756	4,766
Total current liabilities	27,134	30,411
Other long-term liabilities	210	228
Contingent consideration	5,797
Long-term deferred tax liabilities	6,865	6,415
Total liabilities	40,006	37,054
Commitments and contingencies (Note 10)
Stockholders' equity:
Class B Preferred Stock, $.01 par value Authorized - 1,000,000 shares; Issued and outstanding - none	0	0
Common stock, $.01 par value Authorized - 100,000,000 shares; Issued - 41,831,077 shares at September 30, 2014 and 41,122,695 shares at March 31, 2014; Outstanding - 40,577,134 shares at September 30, 2014 and 39,916,328 shares at March 31, 2014	417	411
Additional paid in capital	447,433	436,136
Accumulated deficit	(248,780)	(250,910)
Treasury stock at cost - 1,253,943 shares at September 30, 2014 and 1,206,367 shares at March 31, 2014	(17,567)	(16,554)
Accumulated other comprehensive loss	(5,965)	(730)
Total stockholders' equity	175,538	168,353
Total liabilities and stockholders' equity	$ 215,544	$ 205,407