Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.19.3
Stockholders' Equity - Additional Information (Detail)
 1 Months Ended 3 Months Ended
Aug. 17, 2018
USD ($)
Aug. 31, 2019
shares
Mar. 31, 2019
USD ($)
$ / shares
shares
Jan. 31, 2018
USD ($)
Sep. 30, 2019
Vote
shares
Mar. 31, 2019
USD ($)
$ / shares
shares
Class of Stock [Line Items]            
Number of common stock voting entitlement per share | Vote         1  
Issuance of shares and warrants in private placements, net of issuance costs     $ 23,319,156     $ 23,319,156
Net of issuance costs from offering of shares     $ 1,680,844      
Class of warrant or right, number of securities called by warrants or rights | shares     1,666,666     1,666,666
Class of warrant or right, exercise price of warrants or rights | $ / shares     $ 10.00     $ 10.00
Common Stock [Member]            
Class of Stock [Line Items]            
Issuance of shares and warrants in private placements, net of issuance costs           $ 33
Number of shares returned | shares         38,666  
RSU Rescission Agreements [Member] | Common Stock [Member]            
Class of Stock [Line Items]            
Number of shares returned | shares   38,666        
Consummation of Offering Under Shelf Registration [Member]            
Class of Stock [Line Items]            
Stock issued during period, value, new issues       $ 38,846,815    
Underwriter's discount and issuance costs       $ 1,153,715    
Proceeds from shelf registration debt or equity securities $ 75,000,000