Activity in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Accounting Policies [Abstract]
Balance At Beginning Of Year	$ 665	$ 574	$ 523
Provision	626	627	510
Write-Offs	(357)	(536)	(459)
Balance At End Of Year	$ 934	$ 665	$ 574