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Commitments And Contingencies (Narrative) (Details) | Feb. 28, 2018 USD ($)
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Purchase Commitment [Member] |
Loss Contingencies [Line Items] |
Commitment outstanding | $ 0
Indemnification Agreement 1 [Member] |
Loss Contingencies [Line Items] |
Liabilities related to indemnification agreement | 0
Indemnification Agreement 2 [Member] |
Loss Contingencies [Line Items] |
Liabilities related to indemnification agreement | $ 0

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

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- 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

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- Definition Purchase commitments amount outstanding. + References No definition available. + Details
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Namespace Prefix: | wdfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |