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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, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018
Earnings Per Share - Denominator For Calculation Of Diluted Earnings Per Share
Numerator for basic and diluted earnings per share	$ 114,765	$ 59,124	$ 139,978	$ 80,554
Denominator for basic earnings per share - weighted average	15,301,613	15,085,660	15,285,024	15,036,644
Effects of dilutive securities:
Stock options for employees, directors and outside consultants	97,550	138,561	91,882	132,566
Denominator for diluted earnings per share	15,399,163	15,224,221	15,376,906	15,169,210
Basic Earnings Per Share	$ 0.01	$ 0.00	$ 0.01	$ 0.01
Diluted Earnings Per Share	$ 0.01	$ 0.00	$ 0.01	$ 0.01

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