INTANGIBLE ASSETS AND GOODWILL - Intangible assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 3,770	$ 4,970
Finite-Lived Intangible Assets, Accumulated Amortization	(2,770)	(1,867)
Net Amount	$ 1,000	3,103
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Estimated Useful Life	6 years
Finite-Lived Intangible Assets, Gross	$ 1,400	2,600
Finite-Lived Intangible Assets, Accumulated Amortization	(1,400)	(1,011)
Net Amount	$ 0	1,589
Non-compete agreement
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Estimated Useful Life	4 years
Finite-Lived Intangible Assets, Gross	$ 2,370	2,370
Finite-Lived Intangible Assets, Accumulated Amortization	(1,370)	(856)
Net Amount	$ 1,000	$ 1,514