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Earnings Per Share - The denominator for the calculation of diluted earnings per share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019
Earnings Per Share - Denominator For Calculation Of Diluted Earnings Per Share
Numerator for basic and diluted earnings per share	$ 177,763	$ 114,765	$ 345,691	$ 139,978
Denominator for basic earnings per share - weighted average	15,424,126	15,301,613	15,410,952	15,285,024
Effects of dilutive securities:
Stock options for employees, directors and outside consultants	108,884	97,550	119,958	91,882
Denominator for diluted earnings per share	15,533,010	15,399,163	15,530,910	15,376,906
Basic Earnings Per Share	$ 0.01	$ 0.01	$ 0.02	$ 0.01
Diluted Earnings Per Share	$ 0.01	$ 0.01	$ 0.02	$ 0.01

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