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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
6 Months Ended 12 Months Ended
Sep. 30, 2020
Mar. 31, 2020
Statement Of Financial Position [Abstract]    
Preference share dividend percentage 7.00% 7.00%
Common stock, par value
Common stock, shares issued 100,965,451 80,398,326
Common stock, shares outstanding 100,965,451 80,398,326