Consolidated Statements of Shareholders' Equity - USD ($)	Preferred Stock [Member]	Common Stock [Member]	Additional Paid in Capital [Member]	Subscriptions Receivable [Member]	Accumulated Deficit [Member]	Total
Balance at Mar. 31, 2019		$ 384,648	$ 19,687,263	$ (2,200)	$ (11,569,556)	$ 8,500,155
Balance, shares at Mar. 31, 2019		38,464,753
Net income (loss)					(2,857,000)	(2,857,000)
Employee compensation-stock option			20,008			20,008
Collection of subscription receivable				2,200		2,200
Issuance of common stock - directors		$ 328	12,172			12,500
Issuance of common stock - directors, shares		32,890
Exercise of stock options		$ 600	9,600			10,200
Exercise of stock options, shares		60,000
Balance at Mar. 31, 2020		$ 385,576	19,729,043		(14,426,556)	5,688,063
Balance, shares at Mar. 31, 2020		38,557,643
Net income (loss)					2,172,365	2,172,365
Employee compensation-stock option			10,210			10,210
Issuance of common stock - directors		$ 431	12,069			12,500
Issuance of common stock - directors, shares		43,105
Exercise of stock options		$ 4,400	22,000			26,400
Exercise of stock options, shares		440,000
Balance at Mar. 31, 2021		$ 390,407	$ 19,773,322		$ (12,254,191)	$ 7,909,538
Balance, shares at Mar. 31, 2021		39,040,748