Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Details)

v3.10.0.1
Stock-Based Compensation - Additional Information (Details)
1 Months Ended 3 Months Ended 9 Months Ended
May 31, 2014
$ / shares
shares
Sep. 30, 2018
USD ($)
shares
Sep. 30, 2017
Sep. 30, 2018
USD ($)
stock_plan
shares
Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of equity incentive plans | stock_plan       2  
Options granted maximum exercisable period (up to)       10 years  
Employees          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost related to non-vested stock options granted | $   $ 1,227,971   $ 1,227,971  
Unrecognized compensation cost related to non-vested stock options granted expect to recognize, period (in years)       3 years 4 days  
Director          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Issuance of shares under stock options issued (in shares) | shares 200,000        
Exercise price of options exchanged (usd per share) | $ / shares $ 15.89        
Non-Employee          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Dividend yield (percent)     0.00%   0.00%
2011 Equity Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available for future awards (in shares) | shares   186,843   186,843  
Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Dividend yield (percent)   0.00% 0.00% 0.00% 0.00%
Restricted shares of common stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost related to non-vested stock options granted expect to recognize, period (in years)       11 months 1 day  
Unrecognized compensation cost | $   $ 87,803   $ 87,803