Annual report pursuant to Section 13 and 15(d)

Stockholders' equity - Additional information (Detail)

v3.21.2
Stockholders' equity - Additional information (Detail)
6 Months Ended 12 Months Ended
Apr. 30, 2021
$ / shares
shares
Oct. 06, 2020
$ / shares
shares
Apr. 22, 2020
shares
Sep. 30, 2019
shares
$ / shares
Dec. 31, 2020
shares
Jun. 30, 2021
USD ($)
$ / shares
shares
Jun. 30, 2020
USD ($)
$ / shares
shares
Dec. 06, 2019
shares
$ / shares
Unrecognised share based compensation expense | $           $ 1,266,000 $ 242,000  
Term of warrants               5 years
weighted-average grant-date fair value of stock options granted | $ / shares           $ 2.68 $ 0  
Securities Purchase Agreement [Member]                
Sale of Stock, Number of Shares Issued in Transaction       186,666        
Sale of stock issue price per share | $ / shares       $ 10.50        
Common Stock [Member]                
Warrants convertible into shares of common stock on exercise     107,095          
Cashless exercise of purchase warrants (In shares)     37,417     37,417 37,417  
Purchase Warrants [Member]                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares               $ 10.50
Number of series of warrants issued               4
Expiry date of warrants               Dec. 06, 2024
Warrants convertible into shares of common stock on exercise               214,190
IPO [Member]                
Sale of Stock, Number of Shares Issued in Transaction   2,666,644            
Sale of stock issue price per share | $ / shares   $ 3.10            
Over-Allotment Option [Member]                
Sale of Stock, Number of Shares Issued in Transaction 317,274 483,870            
Sale of stock issue price per share | $ / shares $ 4.25 $ 3.10            
Pre-funded warrants [Member]                
Sale of Stock, Number of Shares Issued in Transaction 3,036,366       559,162      
Sale of stock issue price per share | $ / shares $ 4.25 3.09            
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares   $ 0.01   $ 10.50        
Number of Warranrs exercised           559,162    
Number of series of warrants issued       4        
Warrants convertible into shares of common stock on exercise       27,526        
Pre-funded warrants [Member] | Beneficial Owner [Member]                
Percentage of beneficial ownership       9.99%