Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - 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)					(1,003,308)	(1,003,308)
Employee compensation-stock option			15,006			15,006
Collection of subscription receivable				2,200		2,200
Issuance of common stock - directors		$ 329	12,171			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 Dec. 31, 2019		$ 385,577	19,724,040		(12,572,864)	7,536,753
Balance, shares at Dec. 31, 2019		38,557,643
Balance at Sep. 30, 2019		$ 385,577	19,719,038		(11,814,915)	8,289,700
Balance, shares at Sep. 30, 2019		38,557,643
Net income (loss)					(757,949)	(757,949)
Employee compensation-stock option			5,002			5,002
Balance at Dec. 31, 2019		$ 385,577	19,724,040		(12,572,864)	7,536,753
Balance, shares at Dec. 31, 2019		38,557,643
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)					3,368,365	3,368,365
Employee compensation-stock option			5,105			5,105
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 Dec. 31, 2020		$ 390,407	19,768,217		(11,058,191)	9,100,433
Balance, shares at Dec. 31, 2020		39,040,748
Balance at Sep. 30, 2020		$ 385,576	19,729,043		(12,225,486)	7,889,133
Balance, shares at Sep. 30, 2020		38,557,643
Net income (loss)					1,167,295	1,167,295
Employee compensation-stock option			5,105			5,105
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 Dec. 31, 2020		$ 390,407	$ 19,768,217		$ (11,058,191)	$ 9,100,433
Balance, shares at Dec. 31, 2020		39,040,748