Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Aug. 31, 2019
Property, plant and equipment
Property, plant and equipment, gross	$ 77,857	$ 79,056
Accumulated depreciation	(52,283)	(49,730)
Property, plant and equipment, net	25,574	29,326
Land and improvements
Property, plant and equipment
Property, plant and equipment, gross	4,997	6,079
Buildings
Property, plant and equipment
Property, plant and equipment, gross	17,992	17,900
Machinery and equipment
Property, plant and equipment
Property, plant and equipment, gross	51,942	51,934
Leasehold improvements
Property, plant and equipment
Property, plant and equipment, gross	2,212	1,828
Construction in progress
Property, plant and equipment
Property, plant and equipment, gross	$ 714	$ 1,315

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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