Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 14,079	$ 10,357
Restricted cash	386	389
Accounts receivable, net of allowance for doubtful accounts of $662 and $337 at September 30, 2012 and December 31, 2011, respectively	17,666	11,163
Inventories	9,362	9,439
Prepaid expenses and other	1,457	414
Total current assets	42,950	31,762
Property and equipment, net	2,896	2,861
Deposits and other	307	404
Total assets	46,153	35,027
Current liabilities:
Accounts payable	4,653	4,757
Accrued expenses	3,849	5,351
Deferred revenue	5,464	2,366
Revolving line of credit	5,535	5,535
Total current liabilities	19,501	18,009
Long term liabilities	798	726
Stockholders' equity:
Common Stock	95	80
Treasury stock	(135)	(115)
Additional paid-in capital	288,193	277,023
Accumulated deficit	(262,399)	(260,895)
Other accumulated comprehensive income (loss)	100	199
Total stockholders' equity	25,854	16,292
Total liabilities and stockholders' equity	$ 46,153	$ 35,027