CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)	Total	Impact of ASC 326 adoption	Common Stock	Additional Paid-in Capital	Retained Earnings
Beginning balance (shares) at Mar. 31, 2020			7,807,834
Beginning balance at Mar. 31, 2020	$ 411,963,067	$ (21,242,249)		$ 227,214,577	$ 184,748,490
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Proceeds from exercise of stock options (in shares)			165,237
Proceeds from exercise of stock options	12,268,554			12,268,554
Common stock repurchases (in shares)			(1,129,875)
Common stock repurchases	(102,452,302)				(102,452,302)
Restricted common stock expense under stock option plan, net of cancellations (in shares)			(37,902)
Restricted common stock expense under stock option plan, net of cancellations	12,302,869			12,302,869
Stock option expense	3,804,674			3,804,674
Net income	88,282,828				88,282,828
Ending balance (shares) at Mar. 31, 2021			6,805,294
Ending balance at Mar. 31, 2021	404,927,441			255,590,674	149,336,767
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Proceeds from exercise of stock options (in shares)			154,699
Proceeds from exercise of stock options	12,805,646			12,805,646
Common stock repurchases (in shares)			(589,533)
Common stock repurchases	(111,139,261)				(111,139,261)
Restricted common stock expense under stock option plan, net of cancellations (in shares)			(22,146)
Restricted common stock expense under stock option plan, net of cancellations	9,036,852			9,036,852
Stock option expense	3,473,913			3,473,913
Net income	$ 53,919,837				53,919,837
Ending balance (shares) at Mar. 31, 2022	6,348,314		6,348,314
Ending balance at Mar. 31, 2022	$ 373,024,428	$ (1,880,346)		280,907,085	92,117,343
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2023-02
Proceeds from exercise of stock options (in shares)			7,569
Proceeds from exercise of stock options	$ 654,920			654,920
Common stock repurchases (in shares)			(73,643)
Common stock repurchases	(14,314,089)				(14,314,089)
Restricted common stock expense under stock option plan, net of cancellations (in shares)			(51,158)
Restricted common stock expense under stock option plan, net of cancellations	4,067,525			4,067,525
Stock option expense	2,442,309			2,442,309
Net income	$ 21,231,990				21,231,990
Ending balance (shares) at Mar. 31, 2023	6,231,082		6,231,082
Ending balance at Mar. 31, 2023	$ 385,226,737			$ 288,071,839	$ 97,154,898