Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Aug. 31, 2019
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Accrued expenses	$ 10,376	$ 7,791
Deferred Tax Assets, Warranty	2,439	2,118
Deferred Tax Assets, Defined benefit pension plan	1,767	1,705
Deferred Tax Assets, Inventory	2,362	1,445
Deferred Tax Assets, Share-based compensation	1,185	1,146
Deferred Tax Assets, Vacation	780	741
Deferred Tax Assets, Net operating loss and capital loss carryforwards	3,009	3,648
Deferred Tax Assets, Deferred revenue	2,282	2,716
Deferred Tax Assets, Allowance for doubtful accounts	683	687
Deferred Tax Assets, Other	2,233	2,074
Gross deferred tax assets	27,116	24,071
Deferred Tax Assets, Valuation allowance	(3,218)	(3,759)
Net deferred tax assets	23,898	20,312
Deferred Tax Liabilities, Intangible assets	(6,054)	(6,163)
Deferred Tax Liabilities, Property, plant and equipment	(8,798)	(3,263)
Total deferred tax liabilities	(14,852)	(9,426)
Net deferred tax assets	$ 9,046	$ 10,886