Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.20.1
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
Mar. 31, 2020
USD ($)
Vote
Dec. 31, 2019
USD ($)
Mar. 31, 2019
USD ($)
$ / shares
shares
Class of Stock [Line Items]            
Number of common stock voting entitlement per share | Vote       1    
Proceeds from private offering of shares of common stock and warrants     $ 23,319,156     $ 23,319,156
Net of issuance costs from offering of shares     $ 1,680,844 $ 141,322 $ 339,081  
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
Proceeds from at the market offering of shares of common stock and warrants       5,506,880 $ 4,557,693  
Common Stock [Member]            
Class of Stock [Line Items]            
Proceeds from private offering of shares of common stock and warrants           $ 33
Proceeds from at the market offering of shares of common stock and warrants       $ 44    
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]            
Proceeds from shelf registration debt or equity securities $ 75,000,000