Revenue - Additional Information (Detail)	6 Months Ended
Aug. 31, 2018
Disaggregation Of Revenue [Line Items]
Revenue unsatisfied performance obligation, practical expedient	true
Minimum [Member]
Disaggregation Of Revenue [Line Items]
Contract with customer, customer payment terms	30 days
Maximum [Member]
Disaggregation Of Revenue [Line Items]
Contract with customer, customer payment terms	90 days

Indicates (true false) whether optional exemption was applied not to disclose amount of transaction price allocated to and explanation of expected timing of revenue recognition for remaining performance obligation, when contract has expected duration of one year or less or right to consideration corresponds directly to performance completed.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130558-203045

Name:	us-gaap_RevenuePracticalExpedientRemainingPerformanceObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration