Schedule of Carrying Amounts of Major classes of Assets and Liabilities Classified as Held-for-Sale (Details) - USD ($) $ in Thousands	Feb. 28, 2019	Aug. 31, 2018	Feb. 28, 2018
Discontinued Operations And Disposal Groups [Abstract]
Receivables, net of allowance of $244	$ 0	$ 3,473	$ 0
Inventories, net	0	3,676	0
Property, plant, and equipment, net	2,744	3,637	0
Intangibles, net	0	51	0
Total assets	2,744	10,837	0
Accounts payable	0	1,476	0
Other current liabilities	0	948	0
Total liabilities	0	2,424	0
Net assets	$ 2,744	$ 8,413	$ 0