v3.26.1
Note 10 - Stock-based Compensation - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jul. 31, 2026
Jan. 31, 2026
Outstanding, shares (in shares) 8,100  
Outstanding, weighted average exercise price (in dollars per share) $ 215  
Outstanding, weighted average remaining contractual term (Year) 4 years 10 months 24 days 5 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) 8,100 8,100
Outstanding, weighted average exercise price (in dollars per share) $ 215 $ 215
Vested and Exercisable, shares (in shares) 8,100  
Vested and Exercisable, weighted average exercise price (in dollars per share) $ 215  
Vested and exercisable, weighted average remaining contractual term (Year) 4 years 10 months 24 days  
Vested and Exercisable, aggregate intrinsic value $ 0