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Stockholders' Equity (Detail Textuals 1) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Jul. 10, 2015
Aug. 30, 2016
Jun. 23, 2016
Dec. 31, 2016
Dec. 31, 2015
Class of Stock [Line Items]          
Proceeds from issuance of common stock, net of issuance costs       $ 6,794 $ 11,061
Proceeds from further issuance of share         $ 9,171
Controlled Equity Offering Sales Agreement | Cantor Fitzgerald & Co., ("Cantor")          
Class of Stock [Line Items]          
Percentage of gross sales price per share sold 3.00%        
Number of common stock issued 114,078     41,996  
Proceeds from issuance of common stock, net of issuance costs       $ 200  
Maximum amount of offering price for common stock $ 8,350        
FBR (the "FBR Sales Agreement")          
Class of Stock [Line Items]          
Percentage of gross sales price per share sold     3.00%    
Number of common stock issued   483,476 766,149    
Proceeds from issuance of common stock, net of issuance costs   $ 2,800 $ 3,900    
Maximum amount of offering price for common stock     $ 2,800    
Proceeds from further issuance of share   $ 1,200