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Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Statement of Stockholders' Equity [Abstract] |  |  |
Issuance of common stock for cash, financing costs | $ 4,000 | $ 5,500 | $ 585
Issuance of Common Stock and Warrants for Cash, Financing Costs |  |  | $ 783

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- Definition Issuance of common stock and warrants for cash, financing costs. + References No definition available. + Details
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