Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Detail)

v3.5.0.2
Stock-Based Compensation - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Sep. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Stock Based Compensation [Line Items]            
Common stock, par value   $ 0.001   $ 0.001   $ 0.001
Stock based compensation expense   $ 611,845 $ 268,039 $ 980,229 $ 485,374  
Number of shares, Options exercised   0 0 0 0  
Weighted average grant date fair value   $ 1.09 $ 1.81 $ 1.01 $ 1.82  
2014 Stock Plan [Member]            
Stock Based Compensation [Line Items]            
Number of shares, Options granted 450,000          
Common stock, par value $ 0.001          
2014 Stock Plan [Member] | Employees Consultants And Directors [Member]            
Stock Based Compensation [Line Items]            
Number of shares, Options granted   88,853 72,235 1,157,734 25,000  
2016 Stock Plan [Member]            
Stock Based Compensation [Line Items]            
Number of shares, Options granted     0   0  
Common shares reserved for issuance   3,750,000   3,750,000    
Stock options vesting period       4 years    
Common stock available for grant   3,305,000   3,305,000    
Maximum term of stock options       10 years