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Condensed Consolidated Statements of Changes in Stockholders’ Equity (Deficit) - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Beginning balance (in shares) at Jan. 31, 2024   3,545,515    
Beginning balance at Jan. 31, 2024 $ (122.3)   $ 930.8 $ (1,053.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Stock issued under stock incentive plan (in shares)   294,761    
Share-based compensation expense 7.6   7.6  
Net income (loss) (56.5)     (56.5)
Ending balance (in shares) at Oct. 31, 2024   3,840,276    
Ending balance at Oct. 31, 2024 (171.2)   938.4 (1,109.6)
Beginning balance (in shares) at Jul. 31, 2024   3,760,860    
Beginning balance at Jul. 31, 2024 (154.5)   936.2 (1,090.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Stock issued under stock incentive plan (in shares)   79,416    
Share-based compensation expense 2.2   2.2  
Net income (loss) (18.9)     (18.9)
Ending balance (in shares) at Oct. 31, 2024   3,840,276    
Ending balance at Oct. 31, 2024 (171.2)   938.4 (1,109.6)
Beginning balance (in shares) at Jan. 31, 2025   3,916,932    
Beginning balance at Jan. 31, 2025 (182.5)   940.5 (1,123.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Stock issued under stock incentive plan (in shares)   211,284    
Stock issued related to debt-for-equity exchange, net of issuance costs (in shares)   26,175,193    
Stock issued related to debt-for-equity exchange, net of issuance costs $ 107.5   107.5  
Stock issued related to the rights offering, net of issuance costs (in shares) 3,063,725      
Stock issued related to the rights offering, net of issuance costs $ 12.1   12.1  
Share-based compensation expense 3.8   3.8  
Net income (loss) 24.0     24.0
Ending balance (in shares) at Oct. 31, 2025   33,367,134    
Ending balance at Oct. 31, 2025 (35.1)   1,063.9 (1,099.0)
Beginning balance (in shares) at Jul. 31, 2025   4,054,758    
Beginning balance at Jul. 31, 2025 (232.1)   943.4 (1,175.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Stock issued under stock incentive plan (in shares)   73,458    
Stock issued related to debt-for-equity exchange, net of issuance costs (in shares)   26,175,193    
Stock issued related to debt-for-equity exchange, net of issuance costs $ 107.5   107.5  
Stock issued related to the rights offering, net of issuance costs (in shares) 3,063,725      
Stock issued related to the rights offering, net of issuance costs $ 12.1   12.1  
Share-based compensation expense 0.9   0.9  
Net income (loss) 76.5     76.5
Ending balance (in shares) at Oct. 31, 2025   33,367,134    
Ending balance at Oct. 31, 2025 $ (35.1)   $ 1,063.9 $ (1,099.0)