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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