Quarterly report [Sections 13 or 15(d)]

Note 9 - Stock-based Compensation - Summary of Stock Option Activity (Details)

v3.25.2
Note 9 - Stock-based Compensation - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Apr. 30, 2025
Jul. 31, 2025
Jan. 31, 2025
Jan. 31, 2024
Outstanding, shares (in shares) 30,750 30,750    
Outstanding, weighted average exercise price (in dollars per share) $ 215 $ 215    
Outstanding, weighted average remaining contractual term (Year)   4 years 1 month 6 days 6 years 4 months 24 days  
Outstanding, aggregate intrinsic value   $ 0   $ 0
Forfeited, shares (in shares)   0    
Forfeited, weighted average exercise price (in dollars per share) 0      
Expired, shares (in shares)   0    
Expired, weighted average exercise price (in dollars per share) 0      
Outstanding, shares (in shares)   30,750 30,750  
Outstanding, weighted average exercise price (in dollars per share) $ 215   $ 215  
Vested and Exercisable, shares (in shares) 30,750      
Vested and Exercisable, weighted average exercise price (in dollars per share) $ 215      
Vested and exercisable, July 31, 2025 (Year)   4 years 1 month 6 days    
Vested and Exercisable, aggregate intrinsic value   $ 0