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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Current assets: |  |  |
Cash and cash equivalents | $ 23,992 | $ 29,485 | [1]
Short-term investments | 24,263 | 28,191 | [1]
Accounts receivable | 4,943 | 6,125 | [1]
Inventories | 11,307 | 13,063 | [1]
Prepaid expenses | 1,661 | 848 | [1]
Other current assets | 913 | 442 | [1]
Total current assets | 67,079 | 78,154 | [1]
Non-current assets: |  |  |
Property and equipment, net | 3,166 | 2,189 | [1]
Goodwill | 1,316 | 1,316 | [1]
Intangible assets, net | 1,294 | 1,344 | [1]
Restricted cash | 308 | 308 | [1]
Other assets | 64 | 70 | [1]
Total assets | 73,227 | 83,381 | [1]
Current liabilities: |  |  |
Accounts payable | 3,493 | 5,674 | [1]
Accrued liabilities | 8,838 | 9,813 | [1]
Deferred revenue | 279 | 181 | [1]
Debt - current | 3,268 | 3,366 | [1]
Warrant liability | 11,356 | 20,390 | [1]
Total current liabilities | 27,234 | 39,424 | [1]
Non-current liabilities: |  |  |
Deferred income taxes | 95 | 89 | [1]
Other non-current liabilities | 1,031 | 1,073 | [1]
Total liabilities | 28,360 | 40,586 | [1]
Commitments and contingencies |  |  | [1]
Stockholders' equity: |  |  |
Common stock | 72 | 72 | [1]
Additional paid-in capital | 548,202 | 545,905 | [1]
Accumulated other comprehensive income | 7 | 7 | [1]
Accumulated deficit | (503,414) | (503,189) | [1]
Total stockholders' equity | 44,867 | 42,795 | [1]
Total liabilities and stockholders' equity | $ 73,227 | $ 83,381 | [1]
[1] | The financial information in this column was derived from audited financial statements included in the Company's 2013 Annual Report on Form 10-K.

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