LEASES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2020	Aug. 31, 2019	Sep. 01, 2019
Lessee, Lease, Description [Line Items]
Weighted average discount rate (as a percent)	8.40%	8.40%
Total lease liabilities	$ 5,740	$ 5,740
Operating lease right-of-use assets	3,127	$ 3,127	$ 0
Rent expense	$ 2,760
Weighted average remaining lease term (in years)	3 years 8 months 12 days	3 years 8 months 12 days
Rent expense under ASC 840			2,852
Right-of-use assets amortization		$ 1,207	0
Amounts included in the measurement of operating lease liabilities		$ 1,740	$ 0
Measurement Period Adjustments | Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Weighted average discount rate (as a percent)				8.40%
Total lease liabilities				$ 7,600
Operating lease right-of-use assets				$ 6,800