ACQUISITION (Components of the Preliminary Purchase Price Allocation) (Details) - USD ($) $ in Thousands	Aug. 31, 2018	May 31, 2018	Aug. 31, 2017	Aug. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 46,329		$ 35,642	$ 35,637
Aeropost, Inc [Member]
Business Acquisition [Line Items]
Current assets	4,196
Other non-current assets	746
Property, plant and equipment	2,059
Intangible assets	16,100
Goodwill	11,230	$ 4,800
Deferred tax assets, long-term	4,163
Total assets acquired	38,494
Current liabilities	(5,862)
Non-current liabilities	(6,967)
Noncontrolling interest	(562)
Net assets acquired	$ 25,103