Accounts Receivable and Allowance for Doubtful Receivables - Allowance for Doubtful Receivables (Detail) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2022	May 31, 2021
Receivables [Abstract]
Balance at beginning of period	$ 1,200	$ 961
Bad debt expense, net of recoveries	180	38
Accounts written off	(45)	(45)
Balance at end of period	$ 1,335	$ 954