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Goodwill (Tables)
 3 Months Ended
Apr. 01, 2017
Goodwill [Abstract]  
Roll-forward of goodwill
The following is a roll-forward of goodwill from year-end 2016 to the end of the first quarter 2017:

 
 
Industrial
Hardware
Segment
  
Security
Products
Segment
  
Metal
Products
Segment
  
Total
 
 
            
Beginning balance
 
$
1,760,793
  
$
13,059,042
  
$
—
  
$
14,819,835
 
Foreign exchange
  
7,553
   
—
   
—
   
7,553
 
Ending balance
 
$
1,768,346
  
$
13,059,042
  
$
—
  
$
14,827,388