DEBT (Summary of Changes in Long-Term Debt) (Details) - USD ($)		9 Months Ended
		May 31, 2021	May 31, 2020	Aug. 31, 2020
Debt Instrument [Line Items]
Current portion of long-term debt		$ 19,437,000
Long-term debt (net of current portion)		112,610,000
Total	[1]	132,047,000
Proceeds from long-term debt incurred during the period,		3,000,000	$ 57,820,000
Regularly scheduled loan payments, Current portion of long-term debt		(1,164,000)
Regularly scheduled loan payments, Long-term debt (net of current portion)		(11,971,000)
Regularly scheduled loan payments total		(13,135,000)
Reclassification of long-term debt due in the next 12 months, Current portion of long-term debt		1,706,000
Reclassification of long-term debt due in the next 12 months, Long-term debt (net of current portion)		(1,706,000)
Reclassification of long-term debt due in the next 12 months total
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar, Current portion of long-term debt	[2]	28,000
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar, Long-term debt (net of current portion)	[2]	(92,000)
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar total	[2]	(64,000)
Current portion of long-term debt		20,554,000
Long-term debt (net of current portion)		101,294,000
Total	[3]	121,848,000
Cash Asset [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral amount		2,800,000		$ 0
NonCash Asset [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral amount		143,700,000		$ 158,600,000
Trinidad [Member]
Debt Instrument [Line Items]
Proceeds from long-term debt incurred during the period, Current portion of long-term debt		547,000
Proceeds from long-term debt incurred during the period, Long-term debt (net of current portion)		2,453,000
Proceeds from long-term debt incurred during the period,		$ 3,000,000

[1] The carrying amount of non-cash assets assigned as collateral for these loans was $158.6 million. No cash assets were assigned as collateral for these loans.

[2] These foreign currency translation adjustments are recorded within Other comprehensive loss.

[3] The carrying amount of cash and non-cash assets assigned as collateral for these loans was $2.8 million and $143.7 million, respectively.