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Inventories (Components Of Inventories) (Details) - USD ($)
$ in Thousands
Feb. 28, 2019
Aug. 31, 2018
Aug. 31, 2017
Inventories [Abstract]      
Finished goods $ 2,818   $ 3,130
Raw materials 22   30
Inventories $ 2,840 $ 3,160 $ 3,160