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Leases (Operating lease rent expense) (Details) - USD ($)
3 Months Ended 6 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Operating Leases        
Operating lease rent expense $ 162,718 $ 164,334 $ 317,182 $ 316,010