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Note 6 - Intangible Assets
 12 Months Ended
Sep. 30, 2017
Notes to Financial Statements  
Intangible Assets Disclosure [Text Block]
(
6
)
Intangible Assets
 
The primary components of
our intangible assets and the related accumulated amortization are as follows:
 
(In thousands)
  
Weighted-
Average Useful
Life (Years)
    
Gross
    
Accumulated Amortization
    
Net Book Value
  
Year ended September 30, 2017:
                                
Customer relationships
  
 
20.0
     $
6,500
     $
(1,018
 )   $
5,482
  
Developed technology and know-how
  
 
20.0
      
1,800
      
(283
 )    
1,517
  
Non-competition agreements
    
4.8
      
3,577
      
(2,663
 )    
914
  
     
 
     $
11,877
     $
(3,964
 )   $
7,913
  
                                 
Year ended October 1, 2016:
                                
Customer relationships
  
 
20.0
     $
6,500
     $
(693
 )   $
5,807
  
Developed technology and know-how
  
 
20.0
      
1,800
      
(192
 )    
1,608
  
Non-competition agreements
    
4.8
      
3,577
      
(1,929
 )    
1,648
  
     
 
     $
11,877
     $
(2,814
 )   $
9,063
  
 
 
Amortization expense for intangibles was
$1.2
million in
2017
and
2016
and
$1.1
million in
2015.
Amortization expense for the next
five
years, assuming
no
change in the estimated useful lives of identified intangible assets, is
$918,000
in
2018,
$705,000
in
2019,
$537,000
in
2020
and 
$414,000
in
2021
and
2022.