Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Date the credit facility terminates, in CCYY-MM-DD format.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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

The ratio of consolidated EBITDA to consolidated interest charges for the most recently completed four fiscal quarters.

No definition available.

Name:	wdfc_EarningsBeforeInterestTaxesDepreciationAndAmortizationInterestCoverageRatio
Namespace Prefix:	wdfc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

The ratio of consolidated funded indebtedness as of termination date to consolidated EBITDA for the most recently completed four fiscal quarters.

No definition available.

Name:	wdfc_EarningsBeforeInterestTaxesDepreciationAndAmortizationLeverageRatio
Namespace Prefix:	wdfc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

Number Of Debt Agreements

No definition available.

Name:	wdfc_NumberOfDebtAgreements
Namespace Prefix:	wdfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_DebtInstrumentAxis=wdfc_OtherUnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_DebtInstrumentAxis=wdfc_NoteAgreementAndCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_StatementScenarioAxis=wdfc_PriorToAmendmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: