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Note 11 - Intangible Assets (Tables)
 6 Months Ended
Apr. 30, 2020
Notes Tables  
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Table Text Block]
   
April 30, 2020
    
October 31, 2019
  
Amortizable intangible assets:
                
Non-compete agreement (estimated life 5 years)
   $
423
     $
200
  
Accumulated amortization
    
(222
 )    
(200
 )
     
201
      
-
  
                 
Customer relationships (estimated lives 7 - 15 years)
   $
5,058
     $
2,879
  
Accumulated amortization
    
(2,126
 )    
(1,884
 )
     
2,932
      
995
  
                 
Backlog (estimated life 1 - 2 years)
    
287
      
134
  
Accumulated amortization
    
(200
 )    
(134
 )
     
87
      
-
  
                 
Patents (estimated life 10 - 14 years)
    
368
      
142
  
Accumulated amortization
    
(61
 )    
(45
 )
     
307
      
97
  
                 
Totals
   $
3,527
     $
1,092
  
                 
Non-amortizable intangible assets:
                
Trademarks
   $
1,174
     $
657