Long-Term Debt - Summary of Long-Term Debt (Detail) - USD ($) $ in Thousands	May 31, 2017	Feb. 28, 2017
Line of Credit Facility [Line Items]
Revolving credit facility	$ 30,000	$ 30,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving credit facility	$ 30,000	$ 30,000

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LongTermDebtNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant