Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($)	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Mar. 31, 2021		$ 13,013	$ 20,150,716	$ (12,254,191)	$ 7,909,538
Beginning balance, shares at Mar. 31, 2021		1,301,358
Net income				573,760	573,760
Issuance of common stock - non-employee		$ 17	16,983		17,000
Issuance of common stock - non-employee, shares		1,667
Employee compensation-stock option			12,727		12,727
Issuance of stock		$ 5,500	4,944,500		4,950,000
Issuance of stock, shares		550,000
Issuance of pre-funded warrants			4,881,667		4,881,667
Payment of stock issuance expenses			(831,087)		(831,087)
Issuance of stock for stock issuance expenses		$ 190	(190)
Issuance of stock for stock issuance expenses, shares		19,047
Redemption and retirement of treasury shares		$ (6,541)	(4,301,149)	(2,854,762)	(7,162,452)
Redemption and retirement of treasury shares, shares		(654,105)
Issuance of common stock - directors		$ 6	4,994		5,000
Issuance of common stock - directors, shares		575
Exercise of stock options		$ 7	4,793		4,800
Exercise of stock options, shares		667
Ending balance, value at Sep. 30, 2021		$ 12,192	24,883,954	(14,535,193)	10,360,953
Ending balance, shares at Sep. 30, 2021		1,219,209
Beginning balance, value at Jun. 30, 2021		$ 13,020	20,160,613	(12,372,804)	7,800,829
Beginning balance, shares at Jun. 30, 2021		1,302,025
Net income				692,373	692,373
Issuance of common stock - non-employee		$ 17	16,983		17,000
Issuance of common stock - non-employee, shares		1,667
Employee compensation-stock option			7,623		7,623
Issuance of stock		$ 5,500	4,944,500		4,950,000
Issuance of stock, shares		550,000
Issuance of pre-funded warrants			4,881,667		4,881,667
Payment of stock issuance expenses			(831,087)		(831,087)
Issuance of stock for stock issuance expenses		$ 190	(190)
Issuance of stock for stock issuance expenses, shares		19,047
Redemption and retirement of treasury shares		$ (6,541)	(4,301,149)	(2,854,762)	(7,162,452)
Redemption and retirement of treasury shares, shares		(654,105)
Issuance of common stock - directors		$ 6	4,994		5,000
Issuance of common stock - directors, shares		575
Ending balance, value at Sep. 30, 2021		$ 12,192	24,883,954	(14,535,193)	10,360,953
Ending balance, shares at Sep. 30, 2021		1,219,209
Beginning balance, value at Mar. 31, 2022		$ 12,212	24,902,694	(14,878,482)	10,036,424
Beginning balance, shares at Mar. 31, 2022		1,221,209
Net income				280,464	280,464
Exercise of common stock warrants		$ 3,090	862,113		865,203
Exercise of common stock warrants, shares		309,001
Issuance of common stock - officers		$ 33	31,216		31,249
Issuance of common stock - officers, shares		3,335
Issuance of common stock - non-employee		$ 100	93,600		93,700
Issuance of common stock - non-employee, shares		10,000
Employee compensation-stock option			86,248		86,248
Issuance of stock		$ 10,000	3,990,000		4,000,000
Issuance of stock, shares		1,000,000
Payment of stock issuance expenses			(637,250)		(637,250)
Issuance of common stock - directors		$ 25	19,991		20,016
Issuance of common stock - directors, shares		2,468
Exercise of pre-funded warrants		$ 5,611	162,723		168,334
Exercise of pre-funded warrants, shares		561,113
Rounding of common stock issued due to reverse split		$ 17	(17)
Rounding of common stock issued due to reverse split, shares		1,688
Ending balance, value at Sep. 30, 2022		$ 31,088	29,511,318	(14,598,018)	14,944,388
Ending balance, shares at Sep. 30, 2022		3,108,814
Beginning balance, value at Jun. 30, 2022		$ 30,177	29,098,800	(14,894,485)	14,234,492
Beginning balance, shares at Jun. 30, 2022		3,017,700
Net income				296,467	296,467
Exercise of common stock warrants		$ 778	217,003		217,781
Exercise of common stock warrants, shares		77,779
Issuance of common stock - officers		$ 33	31,216		31,249
Issuance of common stock - officers, shares		3,335
Issuance of common stock - non-employee		$ 100	93,600		93,700
Issuance of common stock - non-employee, shares		10,000
Employee compensation-stock option			70,699		70,699
Ending balance, value at Sep. 30, 2022		$ 31,088	$ 29,511,318	$ (14,598,018)	$ 14,944,388
Ending balance, shares at Sep. 30, 2022		3,108,814