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Equity - Schedule of weighted average assumptions for stock options (Details) - Year
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disclosure of equity and share based arrangement [Abstract]    
Risk-free interest rate 0.42% 1.32%
Expected life (years) 5 6
Annualized volatility 105.00% 120.00%
Dividend rate 0.00% 0.00%