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Condensed Consolidated Statements of Changes in Temporary Equity and Stockholders’ Equity (Unaudited) - USD ($)
$ in Thousands
Total
Conversions of debt
Conversion of preferred stock
Series E Preferred Stock
Series F Preferred Stock
Series E-1 Preferred Stock
Stockholders’ Equity
Common Stock
Common Stock
Conversions of debt
Common Stock
Conversion of preferred stock
Treasury Stock
Additional Paid in Capital
Additional Paid in Capital
Conversions of debt
Additional Paid in Capital
Conversion of preferred stock
Additional Paid in Capital
Series E Preferred Stock
Additional Paid in Capital
Series F Preferred Stock
Accumulated Deficit
Noncontrolling Interest
Beginning balance, common stock (in shares) at May. 31, 2023               100,927,358                    
Beginning balance at May. 31, 2023 $ 69,679           $ 59,517 $ 101     $ (62) $ 160,194         $ (100,716) $ 10,162
Beginning balance, treasury stock (in shares) at May. 31, 2023                     (5,001,728)              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                    
Shares issued in offering, net of costs (in shares)               14,787,598                    
Shares issued in offering, net of costs 98,156           98,156 $ 16       98,140            
Issuance of common stock from stock plans (in shares)               5,534,837                    
Issuance of common stock from stock plans 0           0 $ 5       (5)            
Issuance of warrants, at fair value 0                                  
Stock issuance costs (234)           (234)         (234)            
Stock-based compensation 10,440           10,440         10,440            
Extinguishment of noncontrolling interest (in shares)               1,484,267                    
Extinguishment of noncontrolling interest 0           9,765 $ 1       9,764           (9,765)
Net loss (22,383)           (21,986)                   (21,986) (397)
Ending balance, common stock (in shares) at Nov. 30, 2023               122,734,060                    
Ending balance at Nov. 30, 2023 155,658           155,658 $ 123     $ (62) 278,299         (122,702) 0
Ending balance, treasury stock (in shares) at Nov. 30, 2023                     (5,001,728)              
Beginning balance, common stock (in shares) at Aug. 31, 2023               110,850,885                    
Beginning balance at Aug. 31, 2023 127,948           127,948 $ 110     $ (62) 240,073         (112,173)  
Beginning balance, treasury stock (in shares) at Aug. 31, 2023                     (5,001,728)              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                    
Shares issued in offering, net of costs (in shares)               6,879,070                    
Shares issued in offering, net of costs 33,440           33,440 $ 8       33,432            
Issuance of common stock from stock plans (in shares)               5,004,105                    
Issuance of common stock from stock plans 0             $ 5       (5)            
Stock-based compensation 4,799           4,799         4,799            
Net loss (10,529)           (10,529)                   (10,529)  
Ending balance, common stock (in shares) at Nov. 30, 2023               122,734,060                    
Ending balance at Nov. 30, 2023 $ 155,658           $ 155,658 $ 123     $ (62) 278,299         (122,702) $ 0
Ending balance, treasury stock (in shares) at Nov. 30, 2023                     (5,001,728)              
Temporary equity outstanding (in shares) at May. 31, 2024       0 0 0                        
Temporary equity , beginning balance at May. 31, 2024       $ 0 $ 0 $ 0                        
Increase (Decrease) in Temporary Equity [Roll Forward]                                    
Preferred Series E Stock, net of issuance costs/Preferred Series F Stock, net of issuance costs/Preferred Series E-1 Stock, net of issuance costs (in shares)       301,673 53,191 6,359                        
Preferred Series E Stock, net of issuance costs/Preferred Series F Stock, net of issuance costs/Preferred Series E-1 Stock, net of issuance costs       $ 6,932 $ 48,350 $ 5,850                        
Conversion of preferred stock (in shares)         (10,191)                          
Conversion of preferred stock         $ (5,350)                          
Temporary equity outstanding (in shares) at Nov. 30, 2024       301,673 43,000 6,359                        
Temporary equity , ending balance at Nov. 30, 2024       $ 6,932 $ 43,000 $ 5,850                        
Beginning balance, common stock (in shares) at May. 31, 2024 139,051,142             144,083,944                    
Beginning balance at May. 31, 2024 $ 124,830             $ 144     $ (62) 374,738         (249,990)  
Beginning balance, treasury stock (in shares) at May. 31, 2024 (5,032,802)                   (5,032,802)              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                    
Shares issued in offering, net of costs (in shares)               55,506,938                    
Shares issued in offering, net of costs $ 180,838             $ 55       180,783            
Issuance of common stock from stock plans (in shares)               1,267,179                    
Issuance of common stock from stock plans 0             $ 2       (2)            
Conversions of debt / preferred stock (in shares)                 19,050,204 1,455,857                
Conversions of debt / preferred stock   $ 104,945 $ 10,191           $ 19 $ 1     $ 104,926 $ 10,190        
Issuance of shares (in shares)               628,541                    
Issuance of shares 519     $ 6       $ 1       518     $ 6      
Issuance of warrants, at fair value 44,115                     44,115            
Conversion of warrants (in shares)               3,853,605                    
Conversion of warrants 0             $ 4       (4)            
Stock issuance costs         $ (4,841)                     $ (4,841)    
Preferred Stock Dividends (672)                     (672)            
Stock-based compensation 542                     542            
Share repurchase (in shares)                     (4,258,397)              
Share repurchase (31,342)             $ (4)     $ (31,338)              
Purchase of capped call options (51,750)                     (51,750)            
Purchase of prepaid forward contract (52,736)                     (52,736)            
Reclass of conversion option 252,900                     252,900            
Net loss $ (142,973)                               (142,973)  
Ending balance, common stock (in shares) at Nov. 30, 2024 216,555,069             225,846,268                    
Ending balance at Nov. 30, 2024 $ 434,572             $ 222     $ (31,400) 858,713         (392,963)  
Ending balance, treasury stock (in shares) at Nov. 30, 2024 (9,291,199)                   (9,291,199)              
Temporary equity outstanding (in shares) at Aug. 31, 2024       301,673 53,191 0                        
Temporary equity , beginning balance at Aug. 31, 2024       $ 6,932 $ 48,350 $ 0                        
Increase (Decrease) in Temporary Equity [Roll Forward]                                    
Preferred Series E Stock, net of issuance costs/Preferred Series F Stock, net of issuance costs/Preferred Series E-1 Stock, net of issuance costs (in shares)           6,359                        
Preferred Series E Stock, net of issuance costs/Preferred Series F Stock, net of issuance costs/Preferred Series E-1 Stock, net of issuance costs           $ 5,850                        
Conversion of preferred stock (in shares)         (10,191)                          
Conversion of preferred stock         $ (5,350)                          
Temporary equity outstanding (in shares) at Nov. 30, 2024       301,673 43,000 6,359                        
Temporary equity , ending balance at Nov. 30, 2024       $ 6,932 $ 43,000 $ 5,850                        
Beginning balance, common stock (in shares) at Aug. 31, 2024               162,471,048                    
Beginning balance at Aug. 31, 2024 $ 241,846             $ 162     $ (62) 496,027         (254,281)  
Beginning balance, treasury stock (in shares) at Aug. 31, 2024                     (5,032,802)              
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                    
Shares issued in offering, net of costs (in shares)               49,382,720                    
Shares issued in offering, net of costs 149,817             $ 49       149,768            
Issuance of common stock from stock plans (in shares)               497,271                    
Issuance of common stock from stock plans 0             $ 1       (1)            
Conversions of debt / preferred stock (in shares)                 7,657,226 1,455,857                
Conversions of debt / preferred stock   $ 48,744 $ 10,191           $ 8 $ 1     $ 48,736 $ 10,190        
Issuance of shares (in shares)               528,541                    
Issuance of shares 0             $ 1       (1)            
Issuance of warrants, at fair value 7,636                     7,636            
Conversion of warrants (in shares)               3,853,605                    
Conversion of warrants 0             $ 4       (4)            
Stock issuance costs         $ (4,841)                     $ (4,841)    
Preferred Stock Dividends (628)                     (672)         44  
Stock-based compensation 3,461                     3,461            
Share repurchase (in shares)                     (4,258,397)              
Share repurchase (31,342)             $ (4)     $ (31,338)              
Purchase of capped call options (51,750)                     (51,750)            
Purchase of prepaid forward contract (52,736)                     (52,736)            
Reclass of conversion option 252,900                     252,900            
Net loss $ (138,726)                               (138,726)  
Ending balance, common stock (in shares) at Nov. 30, 2024 216,555,069             225,846,268                    
Ending balance at Nov. 30, 2024 $ 434,572             $ 222     $ (31,400) $ 858,713         $ (392,963)  
Ending balance, treasury stock (in shares) at Nov. 30, 2024 (9,291,199)                   (9,291,199)