Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 35,220	$ 46,877
Accounts receivable, net	24,978	35,071
Inventories, net	123,280	120,023
Prepaid expenses and other current assets	4,973	10,062
Total current assets	188,451	212,033
Property, plant and equipment, net	35,107	37,204
Long-term restricted cash	103	104
Other assets	12,928	19,904
Total assets	236,589	269,245
Current liabilities
Accounts payable	11,683	19,551
Accrued compensation	7,175	8,285
Warranty	2,107	3,556
Income taxes	356	495
Deferred revenue	6,641	10,786
Other current liabilities	3,711	4,799
Total current liabilities	31,673	47,472
Long-term deferred revenue	544	1,488
Other long-term liabilities	4,944	5,730
Total liabilities	37,161	54,690
Commitments and contingencies (Note 10)
Stockholders' equity
Preferred stock
Common stock	108	107
Additional paid-in capital	503,728	499,332
Treasury stock	(1,218)	(1,218)
Accumulated deficit	(307,659)	(288,443)
Accumulated other comprehensive income	4,469	4,777
Total stockholders' equity	199,428	214,555
Total liabilities and stockholders' equity	$ 236,589	$ 269,245