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Stockholders' Equity (Detail Textuals 3) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Nov. 14, 2013 | Dec. 31, 2015 | Dec. 31, 2014
Equity Offering [Line Items] |  |  |
Purchase price for shares issued under purchase agreement |  | $ 1,406 | $ 3,132
Common stock |  |  |
Equity Offering [Line Items] |  |  |
Number of shares issued under purchase agreement |  | 1,414,424 | 950,000
Purchase price for shares issued under purchase agreement |  | $ 1 | $ 1
November 2013 Stock Purchase Agreement | Common stock | Aspire Capital Fund, LLC |  |  |
Equity Offering [Line Items] |  |  |
Number of shares issued under purchase agreement | 511,509 |  |
Purchase price for shares issued under purchase agreement | $ 2,000 |  |
Period of common stock purchase agreement | 2 years |  |
Stock issued for non-cash consideration | 166,105 |  |
November 2013 Stock Purchase Agreement | Common stock | Maximum | Aspire Capital Fund, LLC |  |  |
Equity Offering [Line Items] |  |  |
Shares committed to purchase | 3,042,038 |  |
Common stock purchase agreement, purchase commitment | $ 18,000 |  |
January 2010 Stock Issuance |  |  |
Equity Offering [Line Items] |  |  |
Number of shares of common stock issued in connection with warrants |  | 202,499 |
October 2010 stock issuance |  |  |
Equity Offering [Line Items] |  |  |
Number of shares of common stock issued in connection with warrants |  | 594,513 |

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