Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Details Textual)

v3.7.0.1
Stock-based Compensation (Details Textual) - USD ($)
shares in Thousands, $ in Thousands
1 Months Ended 3 Months Ended
Jun. 30, 2015
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation, Total   $ 394 $ 1,574
Performance Based Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 99,999    
Share-based Compensation, Total   124  
Research and Development Expense [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation, Total     59
General and Administrative Expense [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation, Total     $ 774
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options   $ 4,162  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   2 years 6 months  
Equity Incentive Plan 2014 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   3,714  
Common Stock, Capital Shares Reserved for Future Issuance   952