Accounts Receivable and Allowance for Doubtful Receivables - Allowance for Doubtful Receivables (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019
Receivables [Abstract]
Balance at beginning of period	$ 940	$ 1,041	$ 715	$ 1,020
Bad debt expense, net of recoveries	132	(18)	780	22
Accounts written off	(198)	(86)	(621)	(105)
Balance at end of period	$ 874	$ 937	$ 874	$ 937