Condensed Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($)	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, Common [Member]	Total
Beginning balance at Mar. 31, 2022	$ 1,400	$ 116,487	$ 385,426,431	$ (11,240,752)		$ 374,303,566
Beginning balance, shares at Mar. 31, 2022	1,400,000	116,485,747
Employee stock awards		$ 338	1,174,725			1,175,063
Employee stock awards, shares		338,375
Stock grants			47,844			47,844
Dividends accumulated on preferred stock				(136,061)		(136,061)
Net income (loss)				3,253,027		3,253,027
Common stock issued for cashless warrant exercise		$ 99	(99)
Common stock issued for cashless warrant exercise, shares		99,762
Preferred stock dividends declared				(638,071)		(638,071)
Ending balance at Jun. 30, 2022	$ 1,400	$ 116,924	386,648,901	(8,761,857)		378,005,368
Ending balance, shares at Jun. 30, 2022	1,400,000	116,923,884
Beginning balance at Mar. 31, 2023	$ 1,400	$ 118,294	391,940,374	(18,941,825)	(522,158)	372,596,085
Beginning balance, shares at Mar. 31, 2023	1,400,000	118,294,478
Employee stock awards		$ 391	822,406			822,797
Employee stock awards, shares		390,111
Stock grants			50,750			50,750
Dividends accumulated on preferred stock				(136,094)		(136,094)
Preferred stock dividends				(638,038)		(638,038)
Net income (loss)				(1,093,033)		(1,093,033)
Treasury shares purchased		(739)			(1,456,005)	$ (1,456,744)
Treasury shares purchased, shares						(738,831)
Ending balance at Jun. 30, 2023	$ 1,400	$ 117,946	$ 392,813,530	$ (20,808,990)	$ (1,978,163)	$ 370,145,723
Ending balance, shares at Jun. 30, 2023	1,400,000	117,945,758