Quarterly report pursuant to Section 13 or 15(d)

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

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Note 9 - Stock-based Compensation - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jul. 31, 2024
Jan. 31, 2023
Outstanding, shares (in shares) 88,850  
Outstanding, weighted average exercise price (in dollars per share) $ 215  
Outstanding, weighted average remaining contractual term (Year) 5 years 9 months 18 days 7 years 4 months 24 days
Outstanding, aggregate intrinsic value $ 0 $ 0
Granted, shares (in shares) 0  
Granted, weighted average exercise price (in dollars per share) $ 0  
Exercised, shares (in shares) 0  
Exercised, weighted average exercise price (in dollars per share) $ 0  
Forfeited, shares (in shares) (17,649)  
Forfeited, weighted average exercise price (in dollars per share) $ 215  
Expired, shares (in shares) (34,375)  
Expired, weighted average exercise price (in dollars per share) $ 215  
Outstanding, shares (in shares) 36,826  
Outstanding, weighted average exercise price (in dollars per share) $ 215  
Vested and Exercisable, shares (in shares) 29,141  
Vested and Exercisable, weighted average exercise price (in dollars per share) $ 215  
Vested and exercisable, July 31, 2024 (Year) 5 years 6 months  
Vested and Exercisable, aggregate intrinsic value $ 0