Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Aug. 31, 2021	Aug. 31, 2020
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Accrued expenses	$ 10,172	$ 10,376
Deferred Tax Assets, Warranty	3,096	2,439
Deferred Tax Assets, Defined benefit pension plan	1,626	1,767
Deferred Tax Assets, Inventory	2,403	2,362
Deferred Tax Assets, Share-based compensation	1,197	1,185
Deferred Tax Assets, Vacation	749	780
Deferred Tax Assets, Net operating loss and capital loss carryforwards	2,245	3,009
Deferred Tax Assets, Deferred revenue	1,565	2,282
Deferred Tax Assets, Allowance for doubtful accounts	870	683
Deferred Tax Assets, Other	1,169	2,233
Gross deferred tax assets	25,092	27,116
Deferred Tax Assets, Valuation allowance	(1,091)	(3,218)
Net deferred tax assets	24,001	23,898
Deferred Tax Liabilities, Intangible assets	(5,607)	(6,054)
Deferred Tax Liabilities, Property, plant and equipment	(11,113)	(8,798)
Total deferred tax liabilities	(16,720)	(14,852)
Net deferred tax assets	$ 7,281	$ 9,046