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Summary of Grant-date Fair Value of Stock Options Granted and Assumptions Used Binomial Models (Details) - $ / shares
6 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Share-based Payment Arrangement [Abstract]    
Grant-date fair value $ 6.05 $ (0)
Volatility factor 65.38% (0.00%)
Dividend yield (0.00%) (0.00%)
Risk-free interest rate 0.92% (0.00%)
Expected term (in years) 6 years 3 months