Leases (Lease Cost) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Leases [Abstract]
Operating lease cost	$ 27,977,226	$ 26,244,323
Short-term lease cost	1,800	4,500
Variable lease cost	3,621,748	3,376,275
Total lease cost	31,600,774	29,625,098
Cash paid for amounts included in the measurement of lease liabilities	27,559,260	25,618,886
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 12,482,167	$ 36,826,045
Weighted average remaining lease term — operating leases	7 years 3 months 18 days	8 years 4 months 24 days
Weighted-average discount rate — operating leases	6.30%	6.70%