DEBT (Summary of Changes in Long-Term Debt) (Details) - USD ($)		12 Months Ended
		Aug. 31, 2022		Aug. 31, 2021		Aug. 31, 2020
Debt Instrument [Line Items]
Current portion of long-term debt		$ 19,395,000		$ 19,437,000
Long-term debt (net of current portion)		110,110,000		112,610,000
Total	[2]	129,505,000	[1]	132,047,000
Proceeds from long-term debt incurred during the period, Current portion of long-term debt		4,924,000
Proceeds from long-term debt incurred during the period, Long-term debt (net of current portion)		25,709,000
Proceeds from long-term debt incurred during the period		30,633,000	[2]	17,565,000		$ 57,882,000
Repayments of long-term debt, Current portion of long-term debt		(8,110,000)		(5,168,000)
Repayments of long-term debt, Long-term debt (net of current portion)		(14,587,000)		(14,825,000)
Repayments of long-term debt total		(22,697,000)	[2]	(19,993,000)	[2]	(15,164,000)
Refinances of short-term debt, Current portion of long-term debt				2,368,000
Refinances of short-term debt, Long-term debt (net of current portion)				(2,368,000)
Refinances of short-term debt	[2]
Reclassification of long-term debt due in the next 12 months, Current portion of long-term debt		17,618,000
Reclassification of long-term debt due in the next 12 months, Long-term debt (net of current portion)		(17,618,000)
Reclassification of long-term debt due in the next 12 months total	[2]
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar, Current portion of long-term debt	[3]	(112,000)		22,000
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar, Long-term debt (net of current portion)	[3]	(58,000)		(136,000)
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar total	[2],[3]	(170,000)		(114,000)
Current portion of long-term debt		33,715,000		19,395,000		19,437,000
Long-term debt (net of current portion)		103,556,000		110,110,000		112,610,000
Total	[2]	137,271,000	[4]	129,505,000	[1]	132,047,000
Colombia Subsidiary [Member]
Debt Instrument [Line Items]
Proceeds from long-term debt incurred during the period, Current portion of long-term debt				2,736,000
Proceeds from long-term debt incurred during the period, Long-term debt (net of current portion)				14,829,000
Proceeds from long-term debt incurred during the period	[2]			17,565,000
Guatemala Subsidiary [Member]
Debt Instrument [Line Items]
Proceeds from long-term debt incurred during the period, Long-term debt (net of current portion)		4,204,000
Proceeds from long-term debt incurred during the period	[2]	4,204,000
Trinidad Subsidiary [Member]
Debt Instrument [Line Items]
Proceeds from long-term debt incurred during the period, Current portion of long-term debt		4,924,000
Proceeds from long-term debt incurred during the period, Long-term debt (net of current portion)		21,505,000
Proceeds from long-term debt incurred during the period	[2]	26,429,000
Cash Asset [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral amount		5,300,000		7,000,000.0		0
NonCash Asset [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral amount		$ 155,600,000		$ 153,500,000		$ 158,600,000

[1] The carrying amount on non-cash assets assigned as collateral for these loans was $153.5 million. The carrying amount on cash assets assigned as collateral for these loans was $7.0 million.

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

[3] These foreign currency translation adjustments are recorded within other comprehensive loss.

[4] The carrying amount on non-cash assets assigned as collateral for these loans was $155.6 million. The carrying amount on cash assets assigned as collateral for these loans was $5.3 million.