SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Summary of Restricted Cash) (Details) - USD ($) $ in Thousands		Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2015
Cash and Cash Equivalents [Line Items]
Other short-term restricted cash		$ 460	$ 518	$ 61
Other long-term restricted cash		2,818	2,676	$ 1,464
Total restricted cash		3,278	3,194
Federal Regulatory Requirements [Member]
Cash and Cash Equivalents [Line Items]
Restricted cash for land purchase option agreements		300	442
Other short-term restricted cash		160	76
Other long-term restricted cash	[1]	$ 2,818	$ 2,676

[1] Other long-term restricted cash consists mainly of cash deposits held within banking institutions in compliance with federal regulatory requirements in Costa Rica and Panama.