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Stock-Based Compensation (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Stock-Based Compensation (Textual)            
Vesting period     8 months 12 days      
Share-based compensation expense $ 19,000 $ 56,000 $ 39,000 $ 170,000    
Stock options [Member]            
Stock-Based Compensation (Textual)            
Aggregate vested options to purchase shares           265,000
Number of options outstanding 1,756,000   1,756,000   1,846,000  
Options outstanding, vested and expected to vest, aggregate intrinsic value $ 0   $ 0      
Term of stock options description     Stock options granted under the 2006 and 2015 Plans are exercisable over a maximum term of ten years from the date of grant, vest in various installments over a one to four-year period and have exercise prices reflecting the market value of the shares of common stock on the date of grant.