CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Sep. 30, 2011	Mar. 31, 2011
Current assets:
Cash and cash equivalents	$ 5,338	$ 5,831
Short-term marketable securities	55,482	54,481
Accounts receivable, net	15,490	15,376
Inventories	9,211	7,505
Prepaid expenses and other current assets	1,407	1,544
Total current assets	86,928	84,737
Property and equipment, net	6,273	6,273
Intangible assets, net	847	1,632
Goodwill	37,562	38,946
Total assets	131,610	131,588
Current liabilities:
Accounts payable	4,457	6,283
Accrued expenses	9,158	14,078
Deferred revenue	1,819	1,982
Total current liabilities	15,434	22,343
Long-term deferred tax liability	4,332	4,010
Other long-term liabilities	445	492
Total liabilities	20,211	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 - 38,611,276 shares at September 30, 2011 and 37,756,719 shares at March 31, 2011; Outstanding - 38,560,322 shares at September 30, 2011 and 37,705,765 shares at March 31, 2011	386	377
Additional paid-in-capital	391,432	379,218
Accumulated deficit	(278,763)	(274,770)
Treasury stock at cost - 50,954 shares at September 30, 2011 and March 31, 2011	(827)	(827)
Accumulated other comprehensive (loss) income	(829)	745
Total stockholders' equity	111,399	104,743
Total liabilities and stockholders' equity	$ 131,610	$ 131,588