Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income/(loss)	$ 111,841,258	$ (50,945,905)	$ (20,400,686)
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Depreciation and amortization	66,262,530	65,201,151	65,329,951
Amortization of operating lease right-of-use asset	1,885,522
Amortization of financing costs	2,893,392	3,136,051	7,506,509
Unrealized (gain)/loss on derivatives	18,206,769	7,816,401	(8,421,531)
Stock-based compensation expense	3,227,686	5,476,234	5,138,489
Gain on early extinguishment of debt			(4,117,364)
Unrealized foreign currency (gain)/loss, net	311,539	303,835	(63,761)
Other non-cash items, net	(1,200,001)	(48,182)	144,545
Changes in operating assets and liabilities
Trade receivables, net and accrued revenue	563,272	(1,047,956)	(325,132)
Prepaid expenses and other current assets	(222,510)	(537,549)	(579,981)
Due from related parties	(25,692,058)	(17,574,923)	15,576,280
Inventories	115,434	(98,730)	567,835
Other non-current assets	(1,356,007)	(131,457)	(10,171)
Operating lease liabilities—current and long-term	(1,888,347)
Trade accounts payable	1,470,669	793,925	(561,808)
Accrued expenses and other liabilities	(2,078,325)	(2,999,444)	(2,406,945)
Due to related parties	(52,794)	144,129	334,353
Payments for drydocking costs	(5,251,622)	(604,147)	(461,480)
Net cash provided by operating activities	169,036,407	8,883,433	57,249,103
Cash flows from investing activities:
Vessel-related capital expenditures	(19,883,090)	(3,972,815)	(297,534)
Payments for short-term investments	(14,888,638)	(499,690)
Proceeds from sale of investment securities	1,767,906
Payments to acquire other fixed assets	(141,012)	(47,799)	(139,503)
Net cash used in investing activities	(33,144,834)	(4,520,304)	(437,037)
Cash flows from financing activities:
Proceeds from long-term debt borrowings		65,137,500	261,000,000
Repayment of long-term debt borrowings	(63,968,414)	(130,205,069)	(251,994,382)
Purchase of treasury stock	(50,642,795)	(1,310,064)	(1,220,535)
Financing costs paid	(40,547)	(628,144)	(3,113,425)
Net cash provided by/(used in) financing activities	(114,651,756)	(67,005,777)	4,671,658
Effects of exchange rates on cash and cash equivalents	(323,336)	(253,086)	(8,042)
Net increase/(decrease) in cash, cash equivalents, and restricted cash	20,916,481	(62,895,734)	61,475,682
Cash, cash equivalents, and restricted cash at the beginning of the period	66,472,646	129,368,380	67,892,698
Cash, cash equivalents, and restricted cash at the end of the period	87,389,127	66,472,646	129,368,380
Supplemental disclosure of cash flow information
Cash paid during the period for interest	32,461,153	36,906,567	27,958,102
Cash paid for amounts included in the measurement of operating lease liabilities	2,810,468
Vessel-related capital expenditures included in liabilities	4,408,333	33,015	60,854
Financing costs included in liabilities	$ 595,138	$ 595,138	$ 142,434