Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenues.
Revenues	$ 88,479,024	$ 85,437,806	$ 216,354,625	$ 238,228,227
Expenses
Voyage expenses	752,404	1,178,702	2,426,518	2,372,839
Charter hire expenses	4,392,132	2,071,206	13,626,580	6,181,206
Vessel operating expenses	19,202,291	19,131,124	58,027,558	52,644,762
Depreciation and amortization	17,253,447	16,710,403	51,346,574	49,450,242
General and administrative expenses	5,548,526	5,037,783	22,764,312	17,669,024
Total expenses	47,148,800	44,129,218	148,191,542	128,318,073
Other income-related parties	545,311	450,169	1,646,014	1,387,536
Operating income	41,875,535	41,758,757	69,809,097	111,297,690
Other income/(expenses)
Interest and finance costs	(6,087,193)	(8,778,905)	(21,839,573)	(27,779,560)
Interest income	53,197	394,876	269,381	1,101,831
Unrealized gain/(loss) on derivatives	479,534	1,446,395	3,952,414	(5,291,504)
Realized gain/(loss) on derivatives	(760,991)	449,276	(3,696,915)	2,191,417
Other gain/(loss), net	265,182	358,513	36,815	895,993
Total other income/(expenses), net	(6,050,271)	(6,129,845)	(21,277,878)	(28,881,823)
Net income	$ 35,825,264	$ 35,628,912	$ 48,531,219	$ 82,415,867
Weighted average shares outstanding Basic (in shares)	50,255,908	53,944,991	50,511,473	54,380,855
Weighted average shares outstanding Diluted (in shares)	50,368,392	54,176,748	50,605,985	54,615,843
Earnings per common share - basic (in dollars per share)	$ 0.71	$ 0.66	$ 0.96	$ 1.52
Earnings per common share - diluted (in dollars per share)	$ 0.71	$ 0.66	$ 0.96	$ 1.51
Net pool revenues - related party
Revenues.
Revenues	$ 82,659,967	$ 77,470,478	$ 199,312,944	$ 208,507,192
Time charter revenues
Revenues.
Revenues	4,665,664	7,859,035	13,928,732	29,112,464
Other revenues, net
Revenues.
Revenues	$ 1,153,393	$ 108,293	$ 3,112,949	$ 608,571