Annual report pursuant to Section 13 and 15(d)

Equity Awards and Warrants - Liability Classified Warrants (Details)

v3.23.2
Equity Awards and Warrants - Liability Classified Warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
12 Months Ended
May 31, 2023
May 30, 2023
Mar. 31, 2023
Feb. 28, 2023
Jan. 31, 2023
Dec. 01, 2022
Jun. 30, 2022
Feb. 14, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Warrants to purchase common shares, shares     71.1          
Exercise price of share     $ 0.50          
Liability Classified Warrants                
Classified as liability $ (16,664)              
Reclassified as equity (25,335)              
Loss on derivative due to change in fair market value 8,750              
Derivative liability (ending balance) $ 79              
Maximum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Exercise price of share $ 0.75              
Minimum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Exercise price of share $ 0.10              
Private Equity Offering                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Warrants to purchase common shares, shares 5.5              
Exercise price of share $ 0.306 $ 0.40            
Private Equity Offering | Maximum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Exercise price of share 0.255              
Private Equity Offering | Minimum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Exercise price of share 0.40              
Accredited Investors                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Warrants to purchase common shares, shares     71.1          
Private Warrant Exchange                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Exercise price of share $ 1.00              
Allotment to placement agent                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Warrants to purchase common shares, shares         10.7   19.4  
Exercise price of share         $ 0.23   $ 0.255  
Second Private Placement                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Warrants to purchase common shares, shares             64.0  
Exercise price of share             $ 0.306  
Initial Warrant                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Warrants to purchase common shares, shares               15.0
Second Warrant Member                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Exercise price of share           $ 0.10    
Second Warrant Member | Maximum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Warrants to purchase common shares, shares       7.5   7.5    
Make-Whole Warrant                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Warrants to purchase common shares, shares               15.0