Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Additional Information (Detail)

v3.7.0.1
Common Stock - Additional Information (Detail) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Schedule Of Stockholders Equity [Line Items]      
Common stock, shares authorized 300,000,000 300,000,000 300,000,000
Common stock, par value $ 0.001 $ 0.001 $ 0.001
Common stock, shares issued 43,840,909 43,840,909 43,058,827
Common stock, outstanding 43,840,909 43,840,909 43,058,827
Cash received from option exercises   $ 177,950  
Cash proceeds from exercise of warrants   $ 1,286,986  
Common Stock [Member]      
Schedule Of Stockholders Equity [Line Items]      
Number of shares, Options exercised 89,462 89,462  
Cash received from option exercises $ 200,000 $ 200,000  
Number of common stock issued upon exercise of warrants 692,620 692,620  
Cash proceeds from exercise of warrants $ 1,300,000 $ 1,300,000  
Cash Less Exercise Provision [Member] | Common Stock [Member]      
Schedule Of Stockholders Equity [Line Items]      
Number of shares, Options exercised 19,462 19,462  
Stock options to purchase shares of common stock 50,000 50,000  
Number of shares, warrants to purchase common stock 89,330 89,330  
Number of common stock issued upon exercise of warrants as cashless 49,127 49,127  
Cash Based Awards [Member] | Common Stock [Member]      
Schedule Of Stockholders Equity [Line Items]      
Number of shares, Options exercised 70,000 70,000  
Number of common stock issued upon exercise of warrants 643,493 643,493