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Debt Long-term debt (Tables)
9 Months Ended
Sep. 30, 2017
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments [Table Text Block]
Long-term debt consisted of the following:
 
September 30,
2017
 
December 31,
2016
Term note
$
44,850

 
$
53,625

Mortgage loan
2,822

 
2,951

Equipment loans

 
1,477

Total
47,672

 
58,053

Less amounts classified as current
2,479

 
7,900

Long-term debt, excluding current portion
$
45,193

 
$
50,153