Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 57,294	$ 36,910
Accounts receivable, net of allowance of $14 and $27 as of December 31, 2012 and December 31, 2011, respectively	1,050	6,264
Inventories, net	16,657	8,935
Prepaid expenses and other current assets	7,013	2,377
Total current assets	82,014	54,486
Property and equipment, net	3,523	5,717
Other long-term assets	335	4,089
Total assets	85,872	64,292
Current liabilities:
Accounts payable	11,641	6,327
Deferred revenue	2,303	3,482
Accrued liabilities and other	2,816	4,359
Total current liabilities	16,760	14,168
Other long-term liabilities	29	343
Total liabilities	16,789	14,511
Commitments and Contingencies (Note 5)
Stockholders’ equity:
Preferred stock, $0.001 par value; 1,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.001 par value; authorized — 25,000; issued — 6,738 and 6,473 shares, as of December 31, 2012 and December 31, 2011, respectively; outstanding — 6,555 and 6,361 shares as of December 31, 2012 and December 31, 2011, respectively	7	7
Treasury stock, 183 shares at December 31, 2012 and 112 shares at December 31, 2011	(2,182)	(978)
Additional paid-in capital	814,411	807,829
Accumulated other comprehensive income	16	(1)
Accumulated deficit	(743,169)	(757,076)
Total stockholders’ equity	69,083	49,781
Total liabilities and stockholders’ equity	$ 85,872	$ 64,292