Quarterly report pursuant to Section 13 or 15(d)

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

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Note 9 - Stock-based Compensation - Summary of RSU Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended
Jul. 31, 2024
Jan. 31, 2024
Jan. 31, 2023
Forfeited, shares (in shares) (18,695)    
Forfeited, weighted average grant date fair value (in dollars per share) $ 61.52    
Forfeited, shares (in shares) (18,695)    
Restricted Stock Units (RSUs) [Member]      
Unvested balance, shares (in shares) 735,998    
Unvested balance, weighted average grant date fair value (in dollars per share) $ 64.77    
Unvested balance, aggregate intrinsic value $ 16,307   $ 10,319
Granted, shares (in shares) 462,030    
Granted, weighted average grant date fair value (in dollars per share) $ 15.88    
Vested, shares (in shares) (178,964)    
Vested, weighted average grant date fair value (in dollars per share) $ 76.6    
Forfeited, shares (in shares) (70,984)    
Forfeited, weighted average grant date fair value (in dollars per share) $ 61.43    
Unvested balance, shares (in shares) 948,080    
Unvested balance, weighted average grant date fair value (in dollars per share) $ 39.03    
Forfeited, shares (in shares) (70,984)    
Market-based Restricted Stock Units (MBRSUs) [Member]      
Unvested balance, shares (in shares) 182,742    
Unvested balance, weighted average grant date fair value (in dollars per share) $ 72.6    
Unvested balance, aggregate intrinsic value $ 2,994 $ 2,562  
Granted, shares (in shares) 10,000    
Granted, weighted average grant date fair value (in dollars per share) $ 12.94    
Vested, shares (in shares) 0    
Vested, weighted average grant date fair value (in dollars per share) $ 0    
Unvested balance, shares (in shares) 174,047    
Unvested balance, weighted average grant date fair value (in dollars per share) $ 70.36