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Earnings Per Share - Computation of basic and diluted earnings per share (Details) - USD ($)	3 Months Ended
	May 31, 2022	May 31, 2021
Earnings Per Share [Abstract]
Numerator for basic and diluted earnings per share	$ 305,636	$ 1,266,752
Denominator for basic earnings per share - weighted average	15,729,175	15,494,421
Effects of dilutive securities:
Stock options for employees, directors and outside consultants	23,249	169,351
Denominator for diluted earnings per share	15,752,424	15,663,772
Basic Earnings Per Share	$ 0.02	$ 0.08
Diluted Earnings Per Share	$ 0.02	$ 0.08

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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
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-URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e1448-109256

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