v3.26.1
Fair value accounting (Details)
$ in Thousands
6 Months Ended
May 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 $ 34,534 $ 30,743
Fair value loss $ 3,800  
Derivative, Loss, 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 $ 34,500 $ 30,700
Level 3 | Recurring | Common stock price    
Fair value accounting    
Measurement input | $ / shares 4.63  
percentage of change in an unobservable input 10.00%  
Gain or loss on the derivative liability, change on unobservable input $ 5,200  
Level 3 | Recurring | Volatility    
Fair value accounting    
Measurement input 0.8207  
Level 3 | Recurring | Risk-free rate    
Fair value accounting    
Measurement input 0.0363  
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 $ 1,400