Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Aug. 31, 2019	Aug. 31, 2018
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Allowance for doubtful accounts	$ 687	$ 947
Deferred Tax Assets, Accrued expenses	7,791	8,142
Deferred Tax Assets, Warranty	2,118	1,648
Deferred Tax Assets, Defined benefit pension plan	1,705	1,528
Deferred Tax Assets, Inventory	1,445	1,935
Deferred Tax Assets, Share-based compensation	1,146	925
Deferred Tax Assets, Vacation	741	797
Deferred Tax Assets, Net operating loss and capital loss carryforwards	3,648	2,868
Deferred Tax Assets, Deferred revenue	2,716	536
Deferred Tax Assets, Other	2,074	665
Gross deferred tax assets	24,071	19,991
Deferred Tax Assets, Valuation allowance	(3,759)	(3,562)
Net deferred tax assets	20,312	16,429
Deferred Tax Liabilities, Intangible assets	(6,163)	(6,648)
Deferred Tax Liabilities, Property, plant and equipment	(3,263)	(4,219)
Total deferred tax liabilities	(9,426)	(10,867)
Net deferred tax assets	$ 10,886	$ 5,562