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Receivables, Net (Tables)
 6 Months Ended
Jul. 01, 2017
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Receivables are summarized as follows:
 
July 1,
2017
 
December 31,
2016
Customers, trade
$
50,658

 
$
39,749

Other receivables
3,044

 
3,963

Gross receivables
53,702

 
43,712

Less: allowance for doubtful accounts
(90
)
 
(107
)
Receivables, net
$
53,612

 
$
43,605