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
3 Months Ended 12 Months Ended
Apr. 30, 2024
Jan. 31, 2024
Outstanding, shares (in shares) 88,850  
Outstanding, weighted average exercise price (in dollars per share) $ 215  
Outstanding, weighted average remaining contractual term (Year) 7 years 1 month 6 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) 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) 88,850 88,850
Outstanding, weighted average exercise price (in dollars per share) $ 215 $ 215
Vested and Exercisable, shares (in shares) 55,533  
Vested and Exercisable, weighted average exercise price (in dollars per share) $ 215  
Vested and Exercisable, aggregate intrinsic value $ 0