Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation Plans (Additional Information) (Detail)

v3.7.0.1
Stock Based Compensation Plans (Additional Information) (Detail) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]          
Exercisable Options Outstanding Shares 675,464   675,464    
Weighted average exercise price per share $ 4.57   $ 4.57    
Unvested Options Outstanding, Shares 710,027   710,027    
Unvested Options Outstanding, Weighted average exercise price     $ 5.34    
Unvested Options Outstanding Weighted average remaining life (yrs)     8 years 10 months 24 days    
Weighted average remaining contractual term on unvested options     6 years 6 months    
Unrecognized stock compensation expense $ 2,942,000   $ 2,942,000    
Weighted average recognition period     3 years 1 month 6 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term     7 years 9 months 18 days   7 years 7 months 6 days
Share-Based Compensation 277,000 $ 175,000 $ 486,602 $ 349,206  
Chief Executive Officer [Member]          
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]          
Unrecognized stock compensation expense $ 565,000   $ 565,000    
Weighted average recognition period     3 years 9 months 18 days    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested Issued , Number     100,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, NonVested in Period, Fair Value     $ 590,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 5.90