Significant Accounting Policies (AcctPro) (Details) - USD ($)	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle
Cash and cash equivalents	$ 30,838,684	$ 103,505,676
Restricted cash - non-current	35,633,962	25,862,704
Total cash, cash equivalents, and restricted cash	66,472,646	129,368,380	$ 67,892,698	$ 97,224,751
Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle
Cash and cash equivalents	30,838,684	103,505,676	17,018,552	46,411,962
Restricted cash - non-current	35,633,962	25,862,704	50,874,146	50,812,789
Total cash, cash equivalents, and restricted cash	$ 66,472,646	$ 129,368,380	$ 67,892,698	$ 97,224,751