v3.26.3
Fair value accounting (Details)
$ in Thousands
9 Months Ended
Aug. 31, 2026
USD ($)
$ / shares
Institution
Nov. 30, 2025
USD ($)
Fair value accounting    
Number of financial institutions, uninsured cash held | Institution 2  
Fair value of the derivative liability $ 22,970 $ 30,743
Fair value gain $ 7,700  
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Derivative Instruments, Net, Pretax  
Level 3    
Fair value accounting    
Fair value of the derivative liability $ 23,000 $ 30,700
Level 3 | Recurring | Common stock price    
Fair value accounting    
Measurement input | $ / shares 3.61  
Percentage of change in an unobservable input 10.00%  
Gain or loss on the derivative liability, change on unobservable input $ 4,100  
Level 3 | Recurring | Volatility    
Fair value accounting    
Measurement input 0.856  
Level 3 | Recurring | Risk-free rate    
Fair value accounting    
Measurement input 0.0369  
Level 3 | Recurring | Project completion    
Fair value accounting    
Percentage of change in an unobservable input 10.00%  
Gain or loss on the derivative liability, change on unobservable input $ 1,100