Quarterly report pursuant to Section 13 or 15(d)

Private Securities Offerings - Additional Information (Detail)

v3.10.0.1
Private Securities Offerings - Additional Information (Detail) - USD ($)
 6 Months Ended
Jun. 15, 2018
Nov. 30, 2018
May 31, 2018
Equity and Equity Units Offering Disclosure [Line Items]      
Common stock, par value   $ 0.001 $ 0.001
Placement Agent      
Equity and Equity Units Offering Disclosure [Line Items]      
Exercise price of warrants, per share $ 0.55    
Warrants to purchase common shares, shares 133,600    
Percentage of shares, issued as warrants 8.00%    
Term of warrants 5 years    
Private Equity Offering      
Equity and Equity Units Offering Disclosure [Line Items]      
Exercise price of warrants, per share   $ 0.75  
Warrant covering common stock shares purchased, percentage   50.00%  
Common stock sold at private equity offering   44,957,170  
Common stock, par value   $ 0.001  
Proceeds from private equity offering   $ 22,500,000  
Term of warrants   5 years  
Warrants to purchase common shares, shares   22,478,585  
Proceeds from issuance of common shares   $ 19,900,000  
Term of warrants   5 years  
Private Equity Offering | Placement Agent      
Equity and Equity Units Offering Disclosure [Line Items]      
Exercise price of warrants, per share   $ 0.50  
Warrants to purchase common shares, shares   4,245,117  
Percentage of shares, issued as warrants   10.00%  
Term of warrants   5 years  
Payment of one time non-accountable fees   $ 25,000  
Private Equity Offering | Warrants      
Equity and Equity Units Offering Disclosure [Line Items]      
Exercise price of warrants, per share   $ 0.75  
Warrants to purchase common shares, shares   22,478,585