Annual report pursuant to Section 13 and 15(d)

Stock Compensation Plan - Additional Information (Detail)

v3.8.0.1
Stock Compensation Plan - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Jan. 08, 2018
$ / shares
Dec. 31, 2017
USD ($)
$ / shares
shares
May 31, 2017
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of additional shares authorized for issuance under an established share-based compensation plan   2,000,000 1,500,000      
Shares authorized under the incentive plan, before amendment   5,500,000 4,000,000 5,500,000    
Shares authorized under the incentive plan   7,500,000 5,500,000 7,500,000    
Common stock par value | $ / shares   $ 0.001   $ 0.001 $ 0.001  
Shares issued under the 2012 Incentive Plan to date       224,750    
Shares available for future stock option   525,250   525,250    
Number of stock options outstanding   260,633   260,633 162,153 147,105
Shares available for future issuance   264,617   264,617    
Expiration period       10 years    
Unrecognized compensation costs | $   $ 273,182   $ 273,182    
Weighted average period over which unrecognized compensation costs are expected to be recognized       1 year    
Total grant date fair value of options vested | $       $ 445,589 $ 572,786  
Subsequent Event [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock par value | $ / shares $ 0.001          
Stock issued during period shares reverse stock splits ratio 0.10          
Effective date of common stock split Jan. 19, 2018          
Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares vesting period       3 years    
Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares vesting period       2 years    
Stock Options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense | $       $ 435,218 $ 472,780