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Note 15 - Stock Plans (Details) - Nonvested Share Awards
12 Months Ended
Oct. 31, 2015
$ / shares
shares
Nonvested Share Awards [Abstract]  
Nonvested at beginning of period | shares 2,459,138
Nonvested at beginning of period | $ / shares $ 5.02
Granted | shares 1,818,558
Granted | $ / shares $ 2.66
Vested | shares 626,190
Vested | $ / shares $ 4.59
Forfeited | shares 50,737
Forfeited | $ / shares $ 5.53
Nonvested at end of period | shares 3,600,769
Nonvested at end of period | $ / shares $ 4.16