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Note 10 - Employee Benefits - Stock Option Activity (Details)
 12 Months Ended
Oct. 31, 2015
$ / shares
shares
Balance at October 31, 2014 (in shares) | shares 775,060
Balance at October 31, 2014 (in dollars per share) | $ / shares $ 3.91
Granted (in shares) | shares 338,122
Granted (in dollars per share) | $ / shares $ 4.08
Vested (in shares) | shares (266,993)
Vested (in dollars per share) | $ / shares $ 3.92
Forfeited (in shares) | shares (15,372)
Forfeited (in dollars per share) | $ / shares $ 3.94
Balance at October 31, 2015 (in shares) | shares 830,817
Balance at October 31, 2015 (in dollars per share) | $ / shares $ 3.98