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Trading And AvailableForSale Securities At Fair Value (Details 4) - Trading Securities [Member]
 12 Months Ended
Mar. 31, 2020
USD ($)
Trading securities, beginning balance $ 504,000
Sale of investments that use Level 3 inputs (497,000)
Purchase of investments that use Level 3 inputs 10,430,000
Revaluation of investments that use Level 3 inputs 829
Foreign currency translation (7,000)
Trading securities, ending balance 11,259,000
Available for sale securities  
Available for sale securities, beginning balance 2,000
Sale of investments that use Level 3 inputs 0
Purchase of investments that use Level 3 inputs 0
Revaluation of investments that use Level 3 inputs 0
Foreign currency translation 0
Available for sale securities, ending balance $ 2,000