Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
Feb. 28, 2017	Feb. 28, 2018
Related Party Transactions [Abstract]
Life insurance premium payments made, recoverable		$ 1.1
Potential Going Private Transaction Costs	$ 0.9

Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy.

No definition available.

Name:	us-gaap_InsuranceSettlementsReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant