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Business Segments And Foreign Operations (Schedule Of Net Sales By Product Group) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Nov. 30, 2014
Nov. 30, 2013
Revenue from External Customer [Line Items]    
Net sales $ 96,353us-gaap_SalesRevenueNet $ 95,541us-gaap_SalesRevenueNet
Multi-purpose maintenance products [Member]    
Revenue from External Customer [Line Items]    
Net sales 84,904us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= wdfc_MultiPurposeMaintenanceProductsMember		 83,986us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= wdfc_MultiPurposeMaintenanceProductsMember
Homecare and cleaning products [Member]    
Revenue from External Customer [Line Items]    
Net sales $ 11,449us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= wdfc_HomecareAndCleaningProductsMember		 $ 11,555us-gaap_SalesRevenueNet
/ us-gaap_ProductOrServiceAxis
= wdfc_HomecareAndCleaningProductsMember