Consolidated Statements of Shareholders Equity - USD ($)	Common stock	Treasury stock	Additional paid-in capital	Retained earnings/(Accumulated deficit)	Total
Balance at Mar. 31, 2021	$ 510,715	$ (99,862,114)	$ 756,776,217	$ 289,400,512	$ 946,825,330
Balance (in shares) at Mar. 31, 2021	51,071,409
Increase (Decrease) in Shareholders' Equity
Net income for the period				5,869,100	5,869,100
Restricted share award issuances	$ 158		(158)
Restricted share award issuances (in shares)	15,800
Stock-based compensation			647,124		647,124
Purchase of treasury stock		(14,793,180)			(14,793,180)
Balance at Jun. 30, 2021	$ 510,873	(114,655,294)	757,423,183	295,269,612	938,548,374
Balance (in shares) at Jun. 30, 2021	51,087,209
Balance at Mar. 31, 2021	$ 510,715	(99,862,114)	756,776,217	289,400,512	946,825,330
Balance (in shares) at Mar. 31, 2021	51,071,409
Increase (Decrease) in Shareholders' Equity
Net income for the period					36,551,788
Balance at Dec. 31, 2021	$ 512,757	(121,226,936)	759,390,376	285,514,866	924,191,063
Balance (in shares) at Dec. 31, 2021	51,275,609
Balance at Jun. 30, 2021	$ 510,873	(114,655,294)	757,423,183	295,269,612	938,548,374
Balance (in shares) at Jun. 30, 2021	51,087,209
Increase (Decrease) in Shareholders' Equity
Net income for the period				14,101,803	14,101,803
Restricted share award issuances	$ 1,884		(1,884)
Restricted share award issuances (in shares)	188,400
Dividend				(40,437,434)	(40,437,434)
Stock-based compensation			1,290,254		1,290,254
Purchase of treasury stock		(6,553,707)			(6,553,707)
Balance at Sep. 30, 2021	$ 512,757	(121,209,001)	758,711,553	268,933,981	906,949,290
Balance (in shares) at Sep. 30, 2021	51,275,609
Increase (Decrease) in Shareholders' Equity
Net income for the period				16,580,885	16,580,885
Stock-based compensation			678,823		678,823
Purchase of treasury stock		(17,935)			(17,935)
Balance at Dec. 31, 2021	$ 512,757	(121,226,936)	759,390,376	285,514,866	924,191,063
Balance (in shares) at Dec. 31, 2021	51,275,609
Balance at Mar. 31, 2022	$ 513,217	(121,226,936)	760,105,994	280,759,140	920,151,415
Balance (in shares) at Mar. 31, 2022	51,321,695
Increase (Decrease) in Shareholders' Equity
Net income for the period				24,847,720	24,847,720
Restricted share award issuances	$ 158		(158)
Restricted share award issuances (in shares)	15,750
Dividend				(100,337,605)	(100,337,605)
Stock-based compensation			658,872		658,872
Purchase of treasury stock		(971,067)			(971,067)
Balance at Jun. 30, 2022	$ 513,375	(122,198,003)	760,764,708	205,269,255	844,349,335
Balance (in shares) at Jun. 30, 2022	51,337,445
Balance at Mar. 31, 2022	$ 513,217	(121,226,936)	760,105,994	280,759,140	920,151,415
Balance (in shares) at Mar. 31, 2022	51,321,695
Increase (Decrease) in Shareholders' Equity
Net income for the period					96,422,895
Balance at Dec. 31, 2022	$ 515,960	(122,896,838)	763,547,096	196,161,062	837,327,280
Balance (in shares) at Dec. 31, 2022	51,595,898
Balance at Jun. 30, 2022	$ 513,375	(122,198,003)	760,764,708	205,269,255	844,349,335
Balance (in shares) at Jun. 30, 2022	51,337,445
Increase (Decrease) in Shareholders' Equity
Net income for the period				20,311,465	20,311,465
Restricted share award issuances	$ 2,408		(2,408)
Restricted share award issuances (in shares)	240,751
Dividend				(40,332,833)	(40,332,833)
Stock-based compensation			1,740,328		1,740,328
Purchase of treasury stock		(698,835)			(698,835)
Balance at Sep. 30, 2022	$ 515,783	(122,896,838)	762,502,628	185,247,887	825,369,460
Balance (in shares) at Sep. 30, 2022	51,578,196
Increase (Decrease) in Shareholders' Equity
Net income for the period				51,263,710	51,263,710
Restricted share award issuances	$ 177		(177)
Restricted share award issuances (in shares)	17,702
Dividend				(40,350,535)	(40,350,535)
Stock-based compensation			1,044,645		1,044,645
Balance at Dec. 31, 2022	$ 515,960	$ (122,896,838)	$ 763,547,096	$ 196,161,062	$ 837,327,280
Balance (in shares) at Dec. 31, 2022	51,595,898