Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY - Stock option activity (Details)

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STOCKHOLDERS' EQUITY - Stock option activity (Details) - USD ($)
6 Months Ended 12 Months Ended
Feb. 29, 2020
Aug. 31, 2019
Stock Options    
Balance Outstanding 14,761  
Granted 2,867  
Exercised (9)  
Forfeited (3,066)  
Balance Outstanding 14,553 14,761
Vested and expected to vest 12,831  
Exercisable 6,728  
Weighted Average Exercise Price    
Balance Outstanding $ 4.89  
Granted 2.50  
Exercised 2.06  
Forfeited 4.79  
Balance Outstanding 4.44 $ 4.89
Vested and expected to vest 4.45  
Exercisable $ 4.47  
Weighted Average Remaining Contractual Term Outstanding 8 years 7 months 6 days 9 years
Vested and expected to vest 8 years 7 months 6 days  
Weighted Average Remaining Contractual Term Exercisable 8 years 2 months 12 days  
Aggregate Intrinsic Value, Balance Outstanding $ 6 $ 3,192
Aggregate Intrinsic Value Granted 0  
Aggregate Intrinsic Value, Exercised 14  
Aggregate Intrinsic Value, Forfeited 0  
Aggregate Intrinsic Value, Vested and expected to vest 6  
Aggregate Intrinsic Value Exercisable $ 6