Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 44,986	$ 46,877
Accounts receivable, net	24,843	35,071
Inventories, net	100,234	120,023
Restricted cash	106
Prepaid expenses and other current assets	5,056	10,062
Total current assets	175,225	212,033
Property, plant and equipment, net	34,413	37,204
Long-term restricted cash		104
Other assets	12,520	19,904
Total assets	222,158	269,245
Current liabilities
Accounts payable	10,166	19,551
Accrued compensation	7,283	8,437
Warranty	1,700	3,556
Income taxes	278	495
Deferred revenue	6,423	10,786
Other current liabilities	3,932	4,647
Total current liabilities	29,782	47,472
Long-term deferred revenue	456	1,488
Other long-term liabilities	5,844	5,730
Total liabilities	36,082	54,690
Commitments and contingencies (Note 16)
Stockholders' equity
Preferred stock, $0.001 par value, 30,000 shares authorized; none issued or outstanding
Common stock, $0.001 par value, 300,000 shares authorized; 108,293 shares issued and 108,173 shares outstanding at December 31, 2012; 106,809 shares issued and 106,689 shares outstanding at December 31, 2011	108	107
Additional paid-in capital	504,643	499,332
Treasury stock, at cost, 120 shares at December 31, 2012 and 2011	(1,218)	(1,218)
Accumulated deficit	(322,477)	(288,443)
Accumulated other comprehensive income	5,020	4,777
Total stockholders' equity	186,076	214,555
Total liabilities and stockholders' equity	$ 222,158	$ 269,245