Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 23,117	$ 31,073
Restricted Cash	1,877	1,877
Accounts receivable, net of allowance for doubtful accounts of $619 as of September 30, 2012 and $684 as of December 31, 2011	11,446	25,278
Advance billings	824	5,071
Inventories	35,284	29,203
Prepaid expenses and other current assets	5,608	9,024
Total current assets	78,156	101,526
Property and equipment, net	7,633	10,552
Intangibles, net	563	750
Other assets	756	1,015
Total assets	87,108	113,843
Current liabilities:
Accounts payable	10,805	16,785
Accrued compensation and benefits	5,434	5,781
Deferred revenue-current	5,278	12,117
Other current liabilities	7,006	10,666
Total current liabilities	28,523	45,349
Deferred revenues, non-current	3,279	3,158
Other long-term liabilities	3,898	5,191
Total liabilities	35,700	53,698
Commitments and contingencies (Note 6)
Stockholders' equity:
Preferred stock, 2,000 shares authorized; none issued and outstanding	0	0
Common stock, par value $0.001, 120,000 shares authorized; 62,744 shares issued and 58,654 shares outstanding as of September 30, 2012; 62,547 shares issued and 58,366 shares outstanding as of December 31, 2011	63	63
Additional paid-in capital	651,506	650,110
Accumulated other comprehensive income	20,838	20,472
Treasury stock, 4,181 shares as of September, 2012 and December 31, 2011	(37,986)	(37,986)
Accumulated deficit	(583,013)	(572,514)
Total stockholders' equity	51,408	60,145
Total liabilities and stockholders' equity	$ 87,108	$ 113,843