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Stockholders' Equity (Detail Textuals 2) - USD ($) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Mar. 09, 2015 | Apr. 03, 2014 | Dec. 31, 2015 | Dec. 31, 2014
Equity Offering [Line Items] |  |  |  |
Common stock, par value (in dollars per share) |  |  | $ 0.001 | $ 0.001
Proceed from public offering |  |  | $ 9,171 | $ 9,289
Common stock |  |  |  |
Equity Offering [Line Items] |  |  |  |
Number of common shares sold into underwriting agreement (in shares) |  |  | 10,000,000 | 2,857,143
Proceed from public offering |  |  | $ 10 | $ 3
Common stock | April 2014 Underwriting Agreement |  |  |  |
Equity Offering [Line Items] |  |  |  |
Number of common shares sold into underwriting agreement (in shares) |  | 2,857,143 |  |
Common stock, par value (in dollars per share) |  | $ 0.001 |  |
Share price per share | $ 1.00 | $ 3.50 |  |
Proceed from public offering |  | $ 9,300 |  |
Common stock | March 2015 Public Offering |  |  |  |
Equity Offering [Line Items] |  |  |  |
Number of common shares sold into underwriting agreement (in shares) | 10,000,000 |  |  |
Proceed from public offering | $ 9,200 |  |  |

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