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Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 26,661 $ 25,497
Short-term investments 0 287
Accounts receivable, net of allowance of $0 and $5 at September 30, 2012 and December 31, 2011, respectively 3,950 6,096
Inventories 9,682 6,444
Prepaid expenses and other current assets 3,243 1,415
Total current assets 43,536 39,739
Non-current assets:    
Property and equipment, net 1,801 2,032
Goodwill 1,316 1,316
Intangible assets, net 1,597 1,748
Restricted cash 302 303
Other assets 101 229
Total assets 48,653 45,367
Current liabilities:    
Accounts payable 5,700 4,680
Accrued liabilities 8,087 5,825
Deferred revenue 716 111
Debt - current 4,919 2,519
Warrant liability 7,876 7,979
Total current liabilities 27,298 21,114
Non-current liabilities:    
Debt - non-current 3,307 4,697
Other non-current liabilities 1,132 1,243
Total liabilities 31,737 27,054
Commitments and contingencies      
Stockholders' equity:    
Preferred stock 0 9,496
Common stock 55 51
Additional paid-in capital 474,997 452,701
Accumulated deficit (458,136) (443,935)
Total stockholders' equity 16,916 18,313
Total liabilities and stockholders' equity $ 48,653 $ 45,367