CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 26,696	$ 25,497
Short-term investments	0	287
Accounts receivable, net of allowance of $0 and $5 at December 31, 2012 and 2011, respectively	4,444	6,096
Inventories	10,180	6,444
Prepaid expenses	638	810
Other current assets	2,038	605
Total current assets	43,996	39,739
Non-current assets:
Property and equipment, net	1,698	2,032
Goodwill	1,316	1,316
Intangible assets, net	1,546	1,748
Restricted cash	304	303
Other assets	59	229
Total assets	48,919	45,367
Current liabilities:
Accounts payable	7,186	4,680
Accrued liabilities	7,619	5,825
Deferred revenue	77	111
Debt-current	4,828	2,519
Warrant liability	5,903	7,979
Total current liabilities	25,613	21,114
Non-current liabilities:
Debt-non-current	2,896	4,697
Deferred income taxes	62	0
Other non-current liabilities	1,241	1,243
Total liabilities	29,812	27,054
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.001 par value 5,000 shares authorized, issuable in series; 0 and 3 shares issued and outstanding at December 31, 2012 and 2011; respectively, aggregate liquidation preference of $0 and $9,496 at December 31, 2012 and 2011, respectively	0	9,496
Common stock, $0.001 par value 112,500 shares authorized; 56,252 and 51,211 shares issued and outstanding at December 31, 2012 and 2011, respectively	56	51
Additional paid-in capital	478,903	452,701
Accumulated deficit	(459,852)	(443,935)
Total stockholders' equity	19,107	18,313
Total liabilities and stockholders' equity	$ 48,919	$ 45,367