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Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended
	Nov. 30, 2012	Nov. 30, 2011
Fair Value Assets Measured On Recurring Basis [Line Items]
Fair value measurement transfer	$ 0	$ 0

X

- Details

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Namespace Prefix:	wdfc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value measurements transfers between level one and level two.

+ References

No definition available.

+ Details

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Namespace Prefix:	wdfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration