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Stock-Based Compensation Arrangements (Detail Textuals 1) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
May. 22, 2015
Dec. 31, 2015
Dec. 31, 2014
Stock-based compensation      
Compensation cost   $ 745 $ 1,223
Stock options      
Stock-based compensation      
Granted (in shares)   1,470,281 63,000
Weighted average grant-date fair value (in dollars per share)   $ 0.51 $ 2.48
Stock options | 2015 Plan      
Stock-based compensation      
Number of shares reserved 3,500,000    
Maximum life of stock option awards granted 10 years    
Stock options | Minimum      
Stock-based compensation      
Vesting period   3 years  
Stock options | Minimum | 2015 Plan      
Stock-based compensation      
Maximum life of stock option awards granted 1 year    
Stock options | Maximum      
Stock-based compensation      
Vesting period   4 years  
Stock options | Maximum | 2015 Plan      
Stock-based compensation      
Maximum life of stock option awards granted 4 years    
Stock options | Employees and directors | 2015 Plan      
Stock-based compensation      
Granted (in shares)   1,470,000 63,000
Grant date fair value   $ 800 $ 200
Weighted average grant-date fair value (in dollars per share)   $ 0.51 $ 2.48
Total remaining unrecognized compensation cost   $ 1,000  
Weighted-average remaining requisite service period of recognition of unrecognized compensation cost   2 years 2 months 9 days