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Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Millions	Nov. 19, 2015	Feb. 29, 2016
Loss Contingencies [Line Items]
Liabilities related to indemnification agreement		$ 0.0
Attorney's fees and costs	$ 1.5
Purchase Commitment [Member]
Loss Contingencies [Line Items]
Commitment outstanding		$ 0.0

X

- Definition

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Definition

Liabilities related to indemnification agreement.

+ References

No definition available.

+ Details

Name:	wdfc_LiabilitiesRelatedToIndemnificationAgreement
Namespace Prefix:	wdfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Purchase commitments amount outstanding.

+ References

No definition available.

+ Details

Name:	wdfc_PurchaseCommitmentsAmountOutstanding
Namespace Prefix:	wdfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=us-gaap_PurchaseCommitmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: