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Earnings Per Share - The denominator for the calculation of diluted earnings per share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2018	Nov. 30, 2017
Earnings Per Share - Denominator For Calculation Of Diluted Earnings Per Share
Numerator for basic and diluted earnings per share	$ 20,259	$ 194,442	$ 100,813	$ 264,956
Denominator for basic earnings per share - weighted average	15,164,440	14,969,933	15,078,933	14,964,048
Effects of dilutive securities:
Stock options for employees, directors and outside consultants	221,654	143,456	205,138	109,528
Denominator for diluted earnings per share	15,386,094	15,113,389	15,284,071	15,073,576
Basic Earnings Per Share	$ 0	$ 0.01	$ 0.01	$ 0.02
Diluted Earnings Per Share	$ 0	$ 0.01	$ 0.01	$ 0.02

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Net number of share options (or share units) granted during the period.

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