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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 58,201 | $ 26,696
Accounts receivable | 5,868 | 4,444
Inventories | 12,762 | 10,180
Prepaid expenses | 739 | 638
Other current assets | 200 | 2,038
Total current assets | 77,770 | 43,996
Non-current assets: |  |
Property and equipment, net | 1,641 | 1,698
Goodwill | 1,316 | 1,316
Intangible assets, net | 1,445 | 1,546
Restricted cash | 304 | 304
Other assets | 72 | 59
Total assets | 82,548 | 48,919
Current liabilities: |  |
Accounts payable | 5,035 | 7,186
Accrued liabilities | 8,748 | 7,619
Deferred revenue | 153 | 77
Debt - current | 2,157 | 4,828
Warrant liability | 10,290 | 5,903
Total current liabilities | 26,383 | 25,613
Non-current liabilities: |  |
Debt - non-current | 0 | 2,896
Deferred income taxes | 75 | 62
Other non-current liabilities | 1,145 | 1,241
Total liabilities | 27,603 | 29,812
Commitments and contingencies |  |
Common stock | 70 | 56
Additional paid-in capital | 531,703 | 478,903
Accumulated deficit | (476,828) | (459,852)
Total stockholders' equity | 54,945 | 19,107
Total liabilities and stockholders' equity | $ 82,548 | $ 48,919

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