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Stockholders' Equity - Additional Information (Detail) - USD ($)
1 Months Ended 6 Months Ended
Jul. 01, 2016
Jun. 30, 2016
Jun. 30, 2016
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total Stock based compensation expense     $ 895,392 $ 839,406
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total Stock based compensation expense     900,000  
Unamortized stock-based compensation cost related to RSU   $ 2,400,000 $ 2,400,000  
Unamortized stock-based compensation cost related to RSU recognition period   26 months    
Board Members and Company Secretary [Member] | Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted during the period     25,891,738  
Board Members and Company Secretary [Member] | Restricted Stock Units (RSUs) [Member] | Subsequent Event [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted during the period 650,000      
Stock options granted during the period 650,000      
Stock options exercise price $ 0.24