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General and administrative expenses - Schedule of general and administrative expenses (Details) - USD ($)
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Selling, general and administrative expense [Abstract]    
Management fees, salaries and wages $ 598,629 $ 761,373
Marketing 466,429 95,848
Office, administration, and regulatory 2,061,063 1,409,627
Professional fees, advisory, and consulting 2,005,562 2,163,987
Travel 10,462 307,582
Total $ 5,142,145 $ 4,738,417