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Leases (Details 1) - USD ($)
Dec. 31, 2019
Mar. 31, 2019
Operating leases:    
Operating lease right-of-use assets $ 15,318,428
Current portion of operating lease liabilities 409,756
Long-term operating lease liabilities 12,670,694
Total operating lease liabilities $ 13,080,450  
Weighted average remaining lease term, Operating leases 4 years 2 months 30 days  
Weighted average discount rate, Operating leases 4.19%