Quarterly report pursuant to Section 13 or 15(d)

Going Concern - (Details)

v3.21.4
Going Concern - (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 03, 2021
Nov. 30, 2021
Nov. 30, 2020
Aug. 31, 2021
Going Concern [Line Items]        
Cash   $ 2,100    
Working capital deficit   11,900    
Net cash provided by (used in) operating activities   (6,674) $ (5,352)  
Retained earnings (accumulated deficit)   (158,051)   $ (149,338)
Private Placement        
Going Concern [Line Items]        
Proceeds from issuance of sale of equity net of issuance costs $ 11,900      
COVID-19, CARES Act        
Going Concern [Line Items]        
Payroll tax, employer, deferral, CARES Act   $ 318