CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Mar. 31, 2011
Current assets:
Cash and cash equivalents	$ 4,151	$ 5,831
Short-term marketable securities	54,982	54,481
Accounts receivable, net	14,541	15,376
Inventories	8,879	7,505
Prepaid expenses and other current assets	1,339	1,544
Total current assets	83,892	84,737
Property and equipment, net	6,214	6,273
Intangible assets, net	1,279	1,632
Goodwill	39,752	38,946
Total assets	131,137	131,588
Current liabilities:
Accounts payable	4,964	6,283
Accrued expenses	8,700	14,078
Deferred revenue	1,715	1,982
Total current liabilities	15,379	22,343
Long-term deferred tax liability	4,106	4,010
Other long-term liabilities	469	492
Total liabilities	19,954	26,845
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 - 38,560,747 shares at June 30, 2011 and 37,756,719 shares at March 31, 2011; Outstanding - 38,509,793 shares at June 30, 2011 and 37,705,765 shares at March 31, 2011	385	377
Additional paid-in-capital	389,217	379,218
Accumulated deficit	(279,364)	(274,770)
Treasury stock at cost - 50,954 shares	(827)	(827)
Accumulated other comprehensive income	1,772	745
Total stockholders' equity	111,183	104,743
Total liabilities and stockholders' equity	$ 131,137	$ 131,588