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DEBT (Summary of Changes in Long-Term Debt) (Details) - USD ($)
 6 Months Ended
Feb. 28, 2021
Feb. 29, 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 $ 45,820,000  
Regularly scheduled loan payments, Current portion of long-term debt (650,000)    
Regularly scheduled loan payments, Long-term debt (net of current portion) (7,817,000)    
Regularly scheduled loan payments total (8,467,000)    
Reclassification of long-term debt, Current portion of long-term debt 1,058,000    
Reclassification of long-term debt, Long-term debt (net of current portion) (1,058,000)    
Reclassification of long-term debt 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] 14,000    
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] (28,000)    
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar total [2] (14,000)    
Current portion of long-term debt 20,406,000    
Long-term debt (net of current portion) 106,160,000    
Total [3] 126,566,000    
Cash Asset [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Collateral amount 3,000,000.0   $ 0
NonCash Asset [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Collateral amount 149,300,000   $ 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, Noncurrent 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 $3.0 million and $149.3 million, respectively.