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Shareholders' Equity - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019	Jan. 20, 2014
Stock Based Compensation [Line Items]
Stock options granted		0	0
Authorized stock repurchase		2,632,500
Additional authorized stock repurchase				1,500,000
Repurchase of treasury stock (in shares)		0	0
Remaining repurchase of shares authorized		490,186
Stock options convertible into shares excluded from diluted earnings per (loss) share calculation	200,000		200,000
General and Administrative
Stock Based Compensation [Line Items]
Share-based compensation			$ 5