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Assets Held for Sale (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
Assets Held for Sale (Details) - USD ($) $ in Thousands	Apr. 30, 2020	May 31, 2020	May 31, 2020	Aug. 31, 2019
Assets held for sale
Assets held for sale		$ 14	$ 14	$ 1,064
Gain on sale of property		760	760
Pawtucket, RI manufacturing facility
Assets held for sale
Assets held for sale				1,050
Proceeds from the sale of property	$ 1,810
Gain on sale of property		760	760
Randolph, MA - Property
Assets held for sale
Assets held for sale		$ 14	$ 14	$ 14