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Commitments And Contingencies (Narrative) (Details)	Feb. 28, 2018 USD ($)
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

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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

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

X

- 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

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:

X

- Details

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Namespace Prefix:
Data Type:	na
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