Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 172,443,930	$ 71,935,018	$ 92,564,653
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	63,396,131	66,432,115	68,462,476
Amortization of operating lease right-of-use assets	10,866,495	9,576,822	9,218,537
Amortization of financing costs	5,600,493	5,889,040	4,695,360
Unrealized gain on derivatives	(2,766,065)	(11,067,870)	(7,202,880)
Stock-based compensation expense	4,280,387	3,332,279	3,356,199
Gain on disposal of vessels		(7,256,897)
Unrealized foreign currency (gain)/loss, net	921,289	166,873	(210,010)
Other non-cash items, net	(4,571,737)	1,267,576	(1,091,825)
Changes in operating assets and liabilities
Trade receivables, net and accrued revenue	(2,429,196)	(650,839)	618,625
Prepaid expenses and other current assets	(54,066)	(2,607,346)	(1,192,336)
Due from related parties	(16,387,264)	897,936	10,656,326
Inventories	(376,044)	(258,887)	(11,261)
Other non-current assets	165,811	(552,201)	1,490,267
Operating lease liabilities-current and long-term	(9,078,157)	(9,590,424)	(9,221,782)
Trade accounts payable	591,835	(115,287)	212,173
Accrued expenses and other liabilities	2,498,574	(4,889,118)	4,309,014
Due to related parties	131,360	(80,370)	(319,047)
Payments for drydocking costs	(1,173,940)	(3,733,250)	(5,738,793)
Net cash provided by operating activities	224,059,836	118,695,170	170,595,696
Cash flows from investing activities:
Payments for vessels and vessel capital expenditures	(68,781,071)	(23,185,913)	(9,492,953)
Purchases of investment securities		(2,250,681)	(4,743,809)
Purchase of U.S. treasury notes	(11,275,322)
Proceeds from sale of investment securities	3,718,981	3,742,429	275,393
Proceeds from maturity of short-term investments			15,000,000
Proceeds from disposal of vessels		90,460,363
Payments to acquire other fixed assets	(3,778)		(17,541)
Net cash provided by/(used in) investing activities	(76,341,190)	68,766,198	1,021,090
Cash flows from financing activities:
Proceeds from long-term debt borrowings	346,000,000	298,250,000	55,378,172
Repayment of long-term debt borrowings	(352,458,012)	(230,317,537)	(99,418,395)
Repurchase of common stock	(1,669,902)	(21,364,822)	(126,260,923)
Financing costs paid	(6,506,267)	(1,664,252)	(4,183,321)
Dividends paid	(220,597,827)	(80,082,210)
Net cash used in financing activities	(235,232,008)	(35,178,821)	(174,484,467)
Effects of exchange rates on cash and cash equivalents	(449,902)	(172,832)	205,753
Net increase/(decrease) in cash, cash equivalents, and restricted cash	(87,963,264)	152,109,715	(2,661,928)
Cash, cash equivalents, and restricted cash at the beginning of the period	236,836,914	84,727,199	87,389,127
Cash, cash equivalents, and restricted cash at the end of the period	148,873,650	236,836,914	84,727,199
Supplemental disclosure of cash flow information
Cash paid during the period for interest excluding interest capitalized to vessels	31,071,625	20,591,883	21,787,205
Cash paid for amounts included in the measurement of operating lease liabilities	11,965,581	10,082,984	10,088,410
Right of use assets recognized	163,337,516
Unpaid lease liability on initial recognition	161,574,834
Capitalized drydocking costs included in liabilities	234,290	6,735	870,776
Vessel-related capital expenditures included in liabilities	1,317,456	107,275	320,992
Unpaid dividends included in liabilities	1,255,861	494,180
Financing costs included in liabilities	663,600	1,689,600	596,800
Reconcilliation of cash and cash equivalents and restricted cash reported within the consolidated balance sheets to the total amount of such items reported in the statements of cash flows:
Cash and cash equivalents	148,797,232	236,758,927	79,330,007
Restricted cash - current			5,315,951
Restricted cash - non-current	76,418	77,987	81,241
Cash and cash equivalents and restricted cash at end of period shown in the statement of cash flows	$ 148,873,650	$ 236,836,914	$ 84,727,199