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Note 9 - Employee Benefits - Restricted Stock Activity (Details) - Restricted Stock [Member] - The 2017 Stock Incentive Plan [Member]
 12 Months Ended
Oct. 31, 2023
$ / shares
shares
Balance (in shares) | shares 377,470
Balance, weighted-average grant date fair value (in dollars per share) | $ / shares $ 3.53
Granted (in shares) | shares 28,560
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares $ 3.74
Vested (in shares) | shares (114,876)
Vested, weighted-average grant date fair value (in dollars per share) | $ / shares $ 3.68
Balance (in shares) | shares 291,154
Balance, weighted-average grant date fair value (in dollars per share) | $ / shares $ 3.49