Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Details)

v3.8.0.1
Stock-Based Compensation - Additional Information (Details)
1 Months Ended 3 Months Ended
May 10, 2018
$ / shares
shares
May 31, 2014
$ / shares
shares
Mar. 31, 2018
USD ($)
stock_plan
shares
Mar. 31, 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 | $     $ 1,463,020  
Unrecognized compensation cost related to non-vested stock options granted expect to recognize, period (in years)     2 years 3 months 11 days  
Director        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Issuance of shares under stock options issued (in 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       0.00%
2011 Equity Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for future awards (in shares)     693,161  
2008 Stock Option Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for future awards (in shares)     134,546  
Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Dividend yield     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)     1 year 3 months 15 days  
Unrecognized compensation cost | $     $ 155,911  
Subsequent Event        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted (in shares) 661,000      
Options exercise price (in usd per share) | $ / shares $ 0.89      
Subsequent Event | Chief Executive Officer        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted (in shares) 350,000      
Subsequent Event | Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 5 years