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Revolving Line of Credit (Tables)
 12 Months Ended
Dec. 31, 2015
Debt Disclosure [Abstract]  
Debt covenants [Table Text Block]
On December 31, 2015, we were in compliance with all financial covenants as detailed below:
Quarterly Financial Covenants
 
Requirement
 
Actual
EBITDA to fixed charges ratio
 
1.10 : 1.00
 
3.12 : 1.00
Minimum tangible net worth
 
$45.0 million
 
$54.0 million