Accounts Receivable and Allowance for Doubtful Receivables - Allowance for Doubtful Receivables (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 31, 2020
Receivables [Abstract]
Balance at beginning of period	$ 954	$ 940	$ 961	$ 715
Bad debt expense, net of recoveries	121	132	159	780
Accounts written off	(59)	(198)	(104)	(621)
Balance at end of period	$ 1,016	$ 874	$ 1,016	$ 874