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Note 7 - Stock-based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 9 Months Ended 12 Months Ended
Oct. 31, 2023
Jan. 31, 2023
Expired or forfeited, options (in shares) 0  
Share-Based Payment Arrangement, Option [Member]    
Outstanding, options (in shares) 40  
Outstanding, weighted average exercise price (in dollars per share) $ 10.85  
Outstanding, weighted average remaining contractual term (Year) 10 months 24 days 1 year 1 month 6 days
Outstanding, aggregate intrinsic value $ 1 $ 19
Exercised, options (in shares) (1)  
Exercised, weighted average exercise price (in dollars per share) $ 6.85  
Exercised, aggregate intrinsic value $ 2  
Expired or forfeited, options (in shares) (17)  
Expired or forfeited, weighted average exercise price (in dollars per share) $ 10.6  
Outstanding, options (in shares) 22 40
Outstanding, weighted average exercise price (in dollars per share) $ 11.15 $ 10.85