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STOCKHOLDERS' EQUITY - Additional Information 2 (Details) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2020	Aug. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Noncash Expense				$ 14,008	$ 13,384
Weighted average remaining contractual term (in years)	8 years 6 months	9 years	9 years 1 month 6 days
Number of shares issued				6,250,000	10,082,000
Weighted-average grant-date fair value of options granted				$ 0.90	$ 2.73
Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense				$ 9,540	$ 9,995
2016 Stock Incentive Plan (the Plan)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued				15,000
Share-based payment award vesting period				3 years
Weighted average remaining contractual term (in years)				10 years
Number of shares issued				6,345	10,082
Unrecognized compensation cost related to non-vested share	$ 7,345			$ 7,345
Weighted-average period, cost expected to be recognized (in years)				1 year 4 months 24 days