General form of registration statement for all companies including face-amount certificate companies

Note 14 - Stock-based Compensation - Options Outstanding and Exercisable (Details)

v3.19.1
Note 14 - Stock-based Compensation - Options Outstanding and Exercisable (Details) - $ / shares
 12 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Options Outstanding, Number of options (in shares) 1,259,560 1,400,584 1,529,704
Options Outstanding, Weighted-average remaining contractual life (Year) 7 years 248 days 7 years 149 days 8 years 98 days
Options Outstanding, Weighted average exercise price (in dollars per share) $ 4.55 $ 4.86 $ 2.48
Options Exercisable, Number of options (in shares) 695,392    
Options Exercisable, Weighted average exercise price (in dollars per share) $ 4.34    
Exercise Price Range One [Member]      
Options Outstanding, Number of options (in shares) 1,085,888    
Options Outstanding, Weighted-average remaining contractual life (Year) 7 years 65 days    
Options Outstanding, Weighted average exercise price (in dollars per share) $ 2.48    
Options Exercisable, Number of options (in shares) 609,368    
Options Exercisable, Weighted average exercise price (in dollars per share) $ 2.48    
Exercise Price Range Two [Member]      
Options Outstanding, Number of options (in shares) 173,672    
Options Outstanding, Weighted-average remaining contractual life (Year) 10 years 295 days    
Options Outstanding, Weighted average exercise price (in dollars per share) $ 17.50    
Options Exercisable, Number of options (in shares) 86,024    
Options Exercisable, Weighted average exercise price (in dollars per share) $ 17.50