Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jul. 01, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 28,870	$ 31,073
Restricted Cash	1,877	1,877
Accounts receivable, net of allowance for doubtful accounts of $619 as of July 1, 2012 and $684 as of December 31, 2011	19,028	25,278
Advance billings	2,418	5,071
Inventories	36,581	29,203
Prepaid expenses and other current assets	6,783	9,024
Total current assets	95,557	101,526
Property and equipment, net	7,687	10,552
Intangibles, net	625	750
Other assets	740	1,015
Total assets	104,609	113,843
Current liabilities:
Accounts payable	15,494	16,785
Accrued compensation and benefits	5,924	5,781
Deferred revenue-current	9,982	12,117
Other current liabilities	8,918	10,666
Total current liabilities	40,318	45,349
Deferred revenues, non-current	3,499	3,158
Other long-term liabilities	4,182	5,191
Total liabilities	47,999	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 July 1, 2012; 62,547 shares issued and 58,366 shares outstanding as of December 31, 2011	63	63
Additional paid-in capital	651,110	650,110
Accumulated other comprehensive income	20,402	20,472
Treasury stock, 4,181 shares as of July 1, 2012 and December 31, 2011	(37,986)	(37,986)
Accumulated deficit	(576,979)	(572,514)
Total stockholders' equity	56,610	60,145
Total liabilities and stockholders' equity	$ 104,609	$ 113,843