Quarterly report pursuant to Section 13 or 15(d)

Equity Awards and Warrants - Warrants (Details)

v3.21.4
Equity Awards and Warrants - Warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
3 Months Ended 6 Months Ended 24 Months Ended
Nov. 30, 2021
Aug. 31, 2021
Nov. 30, 2020
Aug. 31, 2020
Nov. 30, 2021
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Warrant exercises, value $ 533 $ 503 $ 1,739 $ 13,469    
Compensatory Warrants [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Warrant exercises, value         $ 6,400  
Exercise of warrants for cash, shares         7.9 3.5
Compensatory Warrants [Member] | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercise price of warrants, per share $ 1.00       $ 1.00  
Compensatory Warrants [Member] | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercise price of warrants, per share $ 0.40       $ 0.40