Long-Term Debt - Additional Information (Detail) - USD ($)	3 Months Ended
	May 31, 2016	Feb. 29, 2016	May 31, 2015
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, outstanding borrowings	$ 35,000,000	$ 40,000,000
Second Amendment [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, interest rate description	London Interbank Offered Rate ("LIBOR") plus a spread ranging from 1.0% to 2.25%, or 1.8% (LIBOR + 1.25%) at May 31, 2016 and 1.76%
Revolving credit facility, interest rate variable basis spread, option one	1.80%		1.76%
Revolving credit facility, interest rate variable basis spread, option two	1.25%		1.25%
Second Amendment [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, variable basis spread	1.00%
Second Amendment [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, variable basis spread	2.25%
Third Amendment [Member] | Standby Letters of Credit [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, outstanding borrowings	$ 2,100,000
Revolving credit facility, remaining borrowing capacity	62,900,000
Fourth Amendment [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, maximum borrowing capacity	100,000,000
Minimum tangible net worth required	$ 75,000,000
Minimum tangible net worth percentage	25.00%
Credit facility maturity date	Aug. 18, 2016
Extend credit facility maturity date	Aug. 19, 2017
Fourth Amendment [Member] | Revolving Credit Facility [Member] | In certain circumstances [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, maximum borrowing capacity	$ 150,000,000