Note 6 - Intangibles (Tables)
 12 Months Ended
Oct. 01, 2016
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
 
 
2016
 
  
2015
  
Patents and trademarks
 
$
2,268,402
 
   $
2,203,673
 
Trade names
 
 
343,678
 
    
342,416
 
Non-competition agreements
 
 
150,601
 
    
150,048
 
Customer relationships
 
 
2,526,230
 
    
2,516,952
 
 
 
 
5,288,911
 
    
5,213,089
 
Less accumulated amortization
 
 
(3,299,012
)
    
(2,998,327
 )
Net intangibles
 
$
1,989,899
 
   $
2,214,762
 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
   
Estimated
 
   
Amortization
 
Fiscal Years
  
Expense
 
2017
   $
285,000
 
2018
    
278,000
 
2019
    
276,000
 
2020
    
276,000
 
2021
    
273,000