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CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 24,189 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 31,146 us-gaap_CashAndCashEquivalentsAtCarryingValue
Prepaid expenses and other current assets | 4,640 us-gaap_PrepaidExpenseAndOtherAssetsCurrent | 3,388 us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Current assets of discontinued operations | 171 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | 639 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent
Total current assets | 29,000 us-gaap_AssetsCurrent | 35,173 us-gaap_AssetsCurrent
Property, plant and equipment (net) | 387 us-gaap_PropertyPlantAndEquipmentNet | 275 us-gaap_PropertyPlantAndEquipmentNet
Long-term assets of discontinued operations |  | 72 us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssetsNoncurrent
Total assets | 29,387 us-gaap_Assets | 35,520 us-gaap_Assets
Current liabilities: |  |
Accounts payable | 2,792 us-gaap_AccountsPayableCurrent | 2,545 us-gaap_AccountsPayableCurrent
Accrued and other current liabilities | 4,626 us-gaap_AccruedLiabilitiesCurrent | 4,431 us-gaap_AccruedLiabilitiesCurrent
Other liabilities measured at fair value |  | 20 us-gaap_OtherLiabilitiesCurrent
Current liabilities of discontinued operations | 75 us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent | 260 us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent
Total current liabilities | 7,493 us-gaap_LiabilitiesCurrent | 7,256 us-gaap_LiabilitiesCurrent
Other liabilities | 206 us-gaap_OtherLiabilitiesNoncurrent | 241 us-gaap_OtherLiabilitiesNoncurrent
Total liabilities | 7,699 us-gaap_Liabilities | 7,497 us-gaap_Liabilities
Commitments and contingencies |  |
Stockholders' equity: |  |
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2013 and 2014; 335,273 shares issued and outstanding at December 31, 2013 and 2014. Aggregate preference in liquidation of $3,989,749 at December 31, 2013 and 2014. |  |
Common stock, $0.001 par value; 100,000,000 shares authorized at December 31, 2013 and 2014; 19,369,332 and 23,199,469 shares issued and outstanding at December 31, 2013 and 2014, respectively. | 23 us-gaap_CommonStockValue | 19 us-gaap_CommonStockValue
Additional paid-in capital | 330,962 us-gaap_AdditionalPaidInCapital | 317,543 us-gaap_AdditionalPaidInCapital
Accumulated other comprehensive income (loss) | (480)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax | (109)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Accumulated deficit | (308,817)us-gaap_RetainedEarningsAccumulatedDeficit | (289,430)us-gaap_RetainedEarningsAccumulatedDeficit
Total stockholders' equity | 21,688 us-gaap_StockholdersEquity | 28,023 us-gaap_StockholdersEquity
Total liabilities and stockholders' equity | $ 29,387 us-gaap_LiabilitiesAndStockholdersEquity | $ 35,520 us-gaap_LiabilitiesAndStockholdersEquity

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