Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Details Textual)

v3.10.0.1
Stock-based Compensation (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 2,061,008   2,061,008   2,315,035
Share-based Compensation $ 344 $ 324 $ 668 $ 544  
General and Administrative Expense [Member]          
Share-based Compensation $ 300 $ 400 $ 700 $ 500  
Equity Incentive Plan 2013 [Member]          
Common Stock, Capital Shares Reserved for Future Issuance 589,940   589,940    
Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 579,402   579,402    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 1,200   $ 1,200    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     2 years 7 months 6 days    
Restricted Stock [Member]          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 2,000   $ 2,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     2 years 10 months 24 days    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number 250,000   250,000