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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
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
Accumulated Deficit
Noncontrolling Interest
Series E Redeemable Preferred Stock
Series E Redeemable Preferred Stock
Additional Paid in Capital
Series F Convertible Preferred Stock
Series F Convertible Preferred Stock
Additional Paid in Capital
Series E-1 Redeemable Preferred Stock
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)         18,945,841                          
Shares issued in offering, net of costs 121,002     121,002 $ 20       120,982                  
Issuance of common stock from stock plans (in shares)         6,129,471                          
Issuance of common stock from stock plans 0     0 $ 5       (5)                  
Tax payments for restricted stock upon vesting (606)     (606)         (606)                  
Issuance of warrants, at fair value 0                                  
Share cancellations               (67,370)                    
Stock-based compensation 13,634     13,634         13,634                  
Extinguishment of noncontrolling interest (in shares)         1,484,267                          
Extinguishment of noncontrolling interest 0     9,765 $ 1       9,764       (9,765)          
Net loss (85,221)     (84,824)               (84,824) (397)          
Ending balance, common stock (in shares) at Feb. 29, 2024         127,486,937                          
Ending balance at Feb. 29, 2024 118,488     118,488 $ 127     $ (62) 303,963     (185,540) 0          
Ending balance, treasury stock (in shares) at Feb. 29, 2024               (5,069,098)                    
Beginning balance, common stock (in shares) at Nov. 30, 2023         122,734,060                          
Beginning balance at Nov. 30, 2023 155,658     155,658 $ 123     $ (62) 278,299     (122,702)            
Beginning balance, treasury stock (in shares) at Nov. 30, 2023               (5,001,728)                    
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                    
Shares issued in offering, net of costs (in shares)         4,158,243                          
Shares issued in offering, net of costs 23,080     23,080 $ 4       23,076                  
Issuance of common stock from stock plans (in shares)         594,634                          
Tax payments for restricted stock upon vesting (606)     (606)         (606)                  
Share cancellations               (67,370)                    
Stock-based compensation 3,194     3,194         3,194                  
Net loss (62,838)     (62,838)               (62,838)            
Ending balance, common stock (in shares) at Feb. 29, 2024         127,486,937                          
Ending balance at Feb. 29, 2024 $ 118,488     $ 118,488 $ 127     $ (62) 303,963     (185,540) $ 0          
Ending balance, treasury stock (in shares) at Feb. 29, 2024               (5,069,098)                    
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   39,763
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   $ 36,287
Conversion of preferred stock (in shares)                               (53,191)    
Conversion of preferred stock                               $ (48,350)    
Temporary equity outstanding (in shares) at Feb. 28, 2025                           301,673   0   39,763
Temporary equity , ending balance at Feb. 28, 2025                           $ 6,932   $ 0   $ 36,287
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 $ 180,818       $ 55       180,763                  
Issuance of common stock from stock plans (in shares)         1,908,764                          
Issuance of common stock from stock plans 0       $ 3       (3)                  
Tax payments for restricted stock upon vesting (2,970)               (2,970)                  
Conversions of debt / preferred stock (in shares)           19,050,204 7,598,712                      
Conversions of debt / preferred stock   $ 104,945 $ 53,191     $ 19 $ 7     $ 104,926 $ 53,184              
Issuance of shares (in shares)         628,541                          
Issuance of shares 519       $ 1       518         $ 6 $ 6      
Issuance of warrants, at fair value 50,586               50,586                  
Conversion of warrants (in shares)         4,905,256                          
Conversion of warrants 0       $ 5       (5)                  
Preferred Stock Dividends (1,213)               (1,213)                  
Stock issuance costs                               $ (4,841) $ (4,841)  
Stock-based compensation 10,233               10,233                  
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 $ (178,528)                     (178,528)            
Ending balance, common stock (in shares) at Feb. 28, 2025 224,391,160       233,682,359                          
Ending balance at Feb. 28, 2025 $ 454,648       $ 230     $ (31,400) 914,336     (428,518)            
Ending balance, treasury stock (in shares) at Feb. 28, 2025 (9,291,199)             (9,291,199)                    
Temporary equity outstanding (in shares) at Nov. 30, 2024                           301,673   43,000   6,359
Temporary equity , beginning balance at Nov. 30, 2024                           $ 6,932   $ 43,000   $ 5,850
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)                                   33,404
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                                   $ 30,437
Conversion of preferred stock (in shares)                               (43,000)    
Conversion of preferred stock                               $ (43,000)    
Temporary equity outstanding (in shares) at Feb. 28, 2025                           301,673   0   39,763
Temporary equity , ending balance at Feb. 28, 2025                           $ 6,932   $ 0   $ 36,287
Beginning balance, common stock (in shares) at Nov. 30, 2024         225,846,268                          
Beginning balance at Nov. 30, 2024 $ 434,572       $ 222     $ (31,400) 858,713     (392,963)            
Beginning balance, treasury stock (in shares) at Nov. 30, 2024               (9,291,199)                    
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                    
Issuance of common stock from stock plans (in shares)         641,585                          
Issuance of common stock from stock plans 0       $ 1       (1)                  
Tax payments for restricted stock upon vesting (2,970)               (2,970)                  
Conversions of debt / preferred stock (in shares)             6,142,855                      
Conversions of debt / preferred stock     $ 43,000       $ 6       $ 42,994              
Issuance of warrants, at fair value 6,471               6,471                  
Conversion of warrants (in shares)         1,051,651                          
Conversion of warrants 0       $ 1       (1)                  
Preferred Stock Dividends (540)               (540)                  
Stock issuance costs (21)               (21)                  
Stock-based compensation 9,691               9,691                  
Net loss $ (35,555)                     (35,555)            
Ending balance, common stock (in shares) at Feb. 28, 2025 224,391,160       233,682,359                          
Ending balance at Feb. 28, 2025 $ 454,648       $ 230     $ (31,400) $ 914,336     $ (428,518)            
Ending balance, treasury stock (in shares) at Feb. 28, 2025 (9,291,199)             (9,291,199)