Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2022	Aug. 31, 2021
Income Taxes [Line Items]
Valuation allowance	$ 1,203	$ 1,091
Unrecognized tax benefits that would impact effective tax rate	500	500
Interest and penalties recognized	400	300
Accrued interest and penalties	$ 400	800
Maximum [Member]
Income Taxes [Line Items]
Percentage of Recognized largest amount benefit realized upon settlement	50.00%
Statutes of limitation range period	6 years
Minimum [Member]
Income Taxes [Line Items]
Statutes of limitation range period	3 years
Filtration Business [Member]
Income Taxes [Line Items]
Valuation allowance	$ 800	800
Certain Foreign Tax Jurisdiction [Member]
Income Taxes [Line Items]
Valuation allowance reserve in prior year		$ 1,700