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Investments (Narrative) (Details)
12 Months Ended
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Jul. 19, 2019
USD ($)
Coins
Nov. 30, 2018
USD ($)
Disclosure Of Investments [Line Items]        
Non-material investments in private and public companies $ 981,736 $ 0    
Realized gain on investments 6,639 1,274,834    
Unrealized gain on investments $ 794,350 $ 0    
Subscription agreement with Amber AI [Member]        
Disclosure Of Investments [Line Items]        
Market value of digital currency       $ 3,342,285
Number of Ethereum coins redeemed | Coins     14,866  
Fair market value of redeemed Ethereum coins     $ 3,289,398