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Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
ASSETS    
Cash and cash equivalents $ 31,449 $ 25,497
Short-term investments 87 287
Accounts receivable, net of allowance of $0 and $5 at March 31, 2012 and December 31, 2011, respectively 5,022 6,096
Inventories 8,903 6,444
Prepaid expenses and other current assets 1,137 1,415
Total current assets 46,598 39,739
Non-current assets:    
Property and equipment, net 1,917 2,032
Goodwill 1,316 1,316
Intangible assets, net 1,698 1,748
Restricted cash 305 303
Other assets 186 229
Total assets 52,020 45,367
LIABILITIES AND STOCKHOLDERS' EQUITY    
Accounts payable 4,150 4,680
Accrued liabilities 7,497 5,825
Deferred revenue 197 111
Debt-current 3,099 2,519
Warrant liability 12,440 7,979
Total current liabilities 27,383 21,114
Non-current liabilities:    
Debt-non-current 4,126 4,697
Other non-current liabilities 1,203 1,243
Total liabilities 32,712 27,054
Commitments and contingencies      
Stockholders' equity:    
Preferred stock 9,496 9,496
Common stock 54 51
Additional paid-in capital 462,527 452,701
Accumulated deficit (452,769) (443,935)
Total stockholders' equity 19,308 18,313
Total liabilities and stockholders' equity $ 52,020 $ 45,367