Exit Costs Related to Idle Facility (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Exit Costs Related to Idle Facility
Acquisition related costs (Note 14)		$ 365
Exit and demolition costs	$ 70	935
Randolph MA
Exit Costs Related to Idle Facility
Exit and demolition costs		$ 935
RodPack Business
Exit Costs Related to Idle Facility
Exit and demolition costs	$ 70