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Share-Based Compensation (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Allocated Share-based Compensation Expense $ 533,200 $ 851,200
Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost $ 1,381,200  
Expected weighted-average period in years of compensation cost to be recognized 1 year 10 months 6 days  
Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average estimated fair value of shares granted $ 2.34 $ 4.10
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost $ 651,500  
Expected weighted-average period in years of compensation cost to be recognized 2 years 29 days  
Cost of revenue    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Allocated Share-based Compensation Expense $ 46,800 $ 124,300
Research and development    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Allocated Share-based Compensation Expense 52,500 92,300
Selling, General and Administrative Expenses [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Allocated Share-based Compensation Expense 433,900 634,600
Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total fair value of shares vested $ 507,100 $ 994,100