Quarterly report pursuant to Section 13 or 15(d)

Stockholders' equity - Additional information (Detail)

v3.21.2
Stockholders' equity - Additional information (Detail) - USD ($)
$ / shares in Units, $ in Millions
Apr. 30, 2021
Oct. 06, 2020
Sep. 30, 2021
Jun. 30, 2021
Unrecognised share based compensation expense     $ 1.0  
IPO [Member]        
Sale of Stock, Number of Shares Issued in Transaction 3,036,366 2,666,644    
Sale of stock issue price per share $ 4.25 $ 3.10    
Proceeds from Issuance Initial Public Offering $ 14.3 $ 11.5    
Sale of stock net consideration received on the transaction $ 12.7 $ 9.9    
Over-Allotment Option [Member]        
Sale of Stock, Number of Shares Issued in Transaction 317,274 483,870    
Sale of stock issue price per share $ 4.25 $ 3.10    
Pre-funded warrants [Member]        
Sale of Stock, Number of Shares Issued in Transaction   559,162    
Sale of stock issue price per share   $ 3.09    
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 0.01    
Number of Warranrs exercised       559,162