Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Lease liabilities - Additional information (Details)

v3.21.1
Lease liabilities - Additional information (Details)
12 Months Ended
Jan. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
warehouse
Dec. 31, 2019
USD ($)
Lease liabilities.      
Number of Warehouse Leases with Renewal Options | warehouse   1  
Term of leases expire   5 years  
Lease expenses   $ 564,551 $ 515,387
Lease termination, lease liability $ 33,442 (33,442)  
Lease termination, right of use assets $ 42,765    
Lease expenses for short-term lease and low-value lease which are not included in the measurement of lease liabilities   $ 247,262 $ 27,765