Acquisitions (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jan. 07, 2020	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Business Acquisition [Line Items]
Cash paid for business acquisitions, net of cash acquired				$ 0	$ (33,444,000)
Net Sales		$ 120,654,000	$ 133,386,000	240,084,000	$ 280,060,000
HTL Group [Member]
Business Acquisition [Line Items]
Business Acquisition, Date of Acquisition Agreement	Jan. 07, 2020
Cash paid for business acquisitions, net of cash acquired	$ 33,300,000
Goodwill, Acquired During Period	11,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	16,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	6,700,000
Net Sales		$ 3,000,000.0	$ 2,000,000.0	$ 5,500,000
Tradenames | HTL Group [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	3,300,000
Customer relationships | HTL Group [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	12,100,000
Patents | HTL Group [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 700,000