Earnings per Share - Additional Information (Detail) - USD ($)	12 Months Ended
Feb. 29, 2020	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017
Earnings Per Share [Abstract]
Undistributed earnings	$ 0
Options outstanding	0	61,590	172,496	172,496

The earnings that is allocated to common stock and participating securities to the extent that each security may share in earnings as if all of the earnings for the period had been distributed.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
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