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Stock-Based Compensation - Additional Information (Detail)
3 Months Ended
Mar. 15, 2017
Mar. 31, 2017
USD ($)
shares
Mar. 31, 2016
USD ($)
shares
Dec. 31, 2016
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Merger exchange rate 2.3336572      
Aggregate number of common stock   924,706   927,592
Unrecognized compensation cost related to stock options | $   $ 264,823    
Stock Option [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of awards granted   0 0  
Vesting period   48 months    
Term of options to be granted   10 years    
Compensation expense for stock options | $   $ 81,120 $ 42,816  
Weighted average period expected to be recognized   2 years 1 month 6 days    
Stock Option [Member] | One-year Anniversary [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Vesting percentage   25.00%    
Restricted Stock [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Compensation expense for stock options | $   $ 74,265 $ 82,399  
Weighted average period expected to be recognized   1 year 4 months 24 days    
Unrecognized compensation cost related to restricted stock grants | $   $ 366,970    
2011 Equity Incentive Plan [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Merger exchange rate 2.3336572      
Aggregate number of common stock   924,706   924,706
2017 Stock Option and Incentive Plan [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Common stock shares available for issuance   4,600,000    
Percentage applied to the outstanding shares as annual increase in number of shares authorized for issuance   4.00%    
Number of awards granted   0