CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012
Current assets:
Cash and cash equivalents	$ 3,989	$ 5,990
Short-term marketable securities	77,233	71,233
Accounts receivable, net	18,343	20,458
Inventories	12,477	11,142
Prepaid expenses and other current assets	1,749	1,716
Total current assets	113,791	110,539
Property and equipment, net	6,337	6,378
Intangible assets, net		115
Goodwill	34,741	36,846
Other long-term assets	33	33
Total assets	154,902	153,911
Current liabilities:
Accounts payable	6,294	6,910
Accrued expenses	10,134	12,480
Deferred revenue	2,687	3,025
Total current liabilities	19,115	22,415
Long-term deferred tax liability	4,890	4,799
Other long-term liabilities	377	400
Total liabilities	24,382	27,614
Commitments and contingencies (Note 9)
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 - 39,559,821 shares at June 30, 2012 and 39,323,708 shares at March 31, 2012; Outstanding - 39,497,477 shares at June 30, 2012 and 39,272,754 shares at March 31, 2012	395	393
Additional paid in capital	405,688	401,771
Accumulated deficit	(270,156)	(273,275)
Treasury stock at cost - 62,344 shares at June 30, 2012 and 50,954 shares at March 31, 2012	(1,065)	(827)
Accumulated other comprehensive loss	(4,342)	(1,765)
Total stockholders' equity	130,520	126,297
Total liabilities and stockholders' equity	$ 154,902	$ 153,911