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Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 26,667 $ 25,497
Short-term investments 0 287
Accounts receivable, net of allowance of $0 and $5 at June 30, 2012 and December 31, 2011, respectively 3,725 6,096
Inventories 9,373 6,444
Prepaid expenses and other current assets 1,024 1,415
Total current assets 40,789 39,739
Non-current assets:    
Property and equipment, net 1,866 2,032
Goodwill 1,316 1,316
Intangible assets, net 1,647 1,748
Restricted cash 301 303
Other assets 144 229
Total assets 46,063 45,367
Current liabilities:    
Accounts payable 3,508 4,680
Accrued liabilities 6,575 5,825
Deferred revenue 136 111
Debt - current 3,692 2,519
Warrant liability 8,749 7,979
Total current liabilities 22,660 21,114
Non-current liabilities:    
Debt - non-current 3,717 4,697
Other non-current liabilities 1,167 1,243
Total liabilities 27,544 27,054
Commitments and contingencies      
Stockholders' equity:    
Preferred stock 0 9,496
Common stock 55 51
Additional paid-in capital 473,140 452,701
Accumulated deficit (454,676) (443,935)
Total stockholders' equity 18,519 18,313
Total liabilities and stockholders' equity $ 46,063 $ 45,367