v3.26.1
Consolidated Statements of Changes in Temporary Equity and Stockholders' Equity - USD ($)
$ in Thousands
Total
Conversion Of Convertible Debt
Conversion Of Convertible Preferred Stock
Preferred Stock
Stockholders’ Equity
Stockholders’ Equity
Conversion Of Convertible Debt
Stockholders’ Equity
Conversion Of Convertible Preferred Stock
Common Stock
Common Stock
Conversion Of Convertible Debt
Common Stock
Conversion Of Convertible Preferred Stock
Treasury Stock
Additional Paid in Capital
Additional Paid in Capital
Conversion Of Convertible Debt
Additional Paid in Capital
Conversion Of Convertible Preferred Stock
Additional Paid in Capital
Preferred Stock
Accumulated Deficit
Noncontrolling interest
Temporary equity outstanding (in shares) at May. 31, 2024 [1]       0                          
Temporary equity, ending balance at May. 31, 2024 [1]       $ 0                          
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)               21,600,722                  
Shares issued in offering, net of costs 130,849       130,849     $ 23       130,826          
Issuance of common stock from stock compensation plans (in shares)               6,894,166                  
Issuance of common stock from stock plans 0             $ 6       (6)          
Tax payments for restricted stock upon vesting (861)       (861)             (861)          
Conversions of debt / preferred stock (in shares)                 13,213,727                
Conversions of debt / preferred stock   $ 52,060       $ 52,060     $ 13       $ 52,047        
Issuance of warrants, at fair value 5,696       5,696             5,696          
Share cancellations (in shares)               (36,296)     (31,074)            
Common stock issuance costs (284)       (284)             (284)          
Extinguishment of noncontrolling interest (in shares)               1,484,267                  
Extinguishment of noncontrolling interest 0       9,765     $ 1       9,764         (9,765)
Stock-based compensation 17,362       17,362             17,362          
Net loss (149,671)       (149,274)                     (149,274) (397)
Ending balance, common stock (in shares) at May. 31, 2024               144,083,944                  
Ending balance at May. 31, 2024 124,830       124,830     $ 144     $ (62) $ 374,738       (249,990) 0
Ending balance, treasury stock (in shares) at May. 31, 2024                     (5,032,802)            
Increase (Decrease) in Temporary Equity [Roll Forward]                                  
Issuance of Preferred Stock, net of costs (in shares) [1]       495,364                          
Issuance of Preferred Stock, net of costs [1]       $ 184,402                          
Conversion of preferred stock (in shares) [1]       (53,191)                          
Conversion of preferred stock [1]       $ (48,350)                          
Redemption of preferred stock (in shares) [1]       (15)                          
Redemption of preferred stock [1]       $ (15)                          
Temporary equity outstanding (in shares) at May. 31, 2025 [1],[2]       442,158                          
Temporary equity, ending balance at May. 31, 2025 [1],[2]       $ 136,037                          
Redeemable noncontrolling interest, ending balance at May. 31, 2025 [2] 0                                
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 180,766             $ 55       $ 180,711          
Issuance of common stock from stock compensation plans (in shares)               2,427,273                  
Issuance of common stock from stock plans 0             $ 3       (3)          
Tax payments for restricted stock upon vesting (4,116)                     (4,116)          
Conversions of debt / preferred stock (in shares)                 19,050,204 7,598,712              
Conversions of debt / preferred stock   $ 104,945 $ 48,350           $ 19 $ 7     $ 104,926 $ 48,343      
Issuance of other common stock/ Preferred Stock, net of costs (in shares)               628,541                  
Issuance of other common stock/ Preferred Stock, net of costs 519     $ 6       $ 1       518     $ 6    
Issuance of warrants, at fair value 136,292                     136,292          
Exercise of warrants (in shares)               4,905,256                  
Exercise of warrants 0             $ 5       (5)          
Preferred Stock Dividends (2,615)                     (2,615)          
Share repurchase (31,342)             $ (4)     $ (31,338)            
Share repurchase (in shares)                     (4,258,397)            
Purchase of capped call options (51,750)                     (51,750)          
Purchase of prepaid forward contract (52,736)                     (52,736)          
Reclass of debt conversion option 252,900                     252,900          
Stock-based compensation 22,704                     22,704          
Net loss $ (231,065)                             (231,065)  
Ending balance, common stock (in shares) at May. 31, 2025 234,200,868             234,200,868                  
Ending balance at May. 31, 2025 $ 497,688       497,688     $ 230     $ (31,400) 1,009,913       (481,055) 0
Ending balance, treasury stock (in shares) at May. 31, 2025 (7,165,300)                   (9,291,199)            
Increase (Decrease) in Temporary Equity [Roll Forward]                                  
Issuance of Preferred Stock, net of costs (in shares) [2]       835,800                          
Issuance of Preferred Stock, net of costs [2]       $ 803,101                          
Conversion of preferred stock (in shares) [2]       (913,800)                          
Conversion of preferred stock [2]       $ (875,185)                          
Redemption of preferred stock (in shares) [2]       (25,576)                          
Redemption of preferred stock [2]       $ (1,187)                          
Contributions from redeemable noncontrolling interest, net of costs [2] $ 1,896,244                                
Redeemable noncontrolling interest preferred stock dividends [2] 62,726                                
Net loss [2] (2,667)                                
Temporary equity outstanding (in shares) at May. 31, 2026 [2]       338,582                          
Temporary equity, ending balance at May. 31, 2026 [2]       $ 62,766                          
Redeemable noncontrolling interest, ending balance at May. 31, 2026 [2] 1,956,303                                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                  
Shares issued in offering, net of costs (in shares)               15,320,373                  
Shares issued in offering, net of costs 190,417       190,417     $ 15       190,402          
Issuance of common stock from stock compensation plans (in shares)               3,024,358                  
Issuance of common stock from stock plans 0             $ 4       (4)          
Tax payments for restricted stock upon vesting (36,282)       (36,282)             (36,282)          
Conversions of debt / preferred stock (in shares)                   50,994,315              
Conversions of debt / preferred stock     $ 875,185       $ 875,185     $ 50       $ 875,135      
Issuance of warrants, at fair value 155,421       155,421             155,421          
Exercise of warrants (in shares)               800,188                  
Exercise of warrants 6,265       6,265     $ 1       6,264          
Preferred Stock Dividends (6,260)       (6,260)             (6,260)          
Treasury Stock repurchase (in shares)                     (7,165,300)            
Treasury Stock repurchase 0                   $ (52,737) 52,737          
Treasury Stock retirement (in shares)               9,291,199     9,291,199            
Treasury Stock retirement 0             $ (4)     $ 31,400 (31,396)          
Acquisition of Ekso Business 56,873       52,269             52,269         4,604
Issuance of warrants by subsidiary, net of costs 4,452       1,630             1,630         2,822
Redeemable noncontrolling interest preferred stock dividends (62,726)       (62,726)             (62,726)          
Stock-based compensation 225,147       225,147             225,147          
Net loss $ (181,672)       (181,278)                     (181,278) (394)
Ending balance, common stock (in shares) at May. 31, 2026 295,048,903             295,048,903                  
Ending balance at May. 31, 2026 $ 1,724,508       $ 1,717,476     $ 296     $ (52,737) $ 2,432,250       $ (662,333) $ 7,032
Ending balance, treasury stock (in shares) at May. 31, 2026 (9,291,199)                   (7,165,300)            
[1] See Note 16 - Temporary Equity for further discussion of preferred stock activity.
[2] See Note 16 - Temporary Equity for further discussion of preferred stock and redeemable noncontrolling interest activity