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Accrued Liabilities
 12 Months Ended
Dec. 31, 2013
Accrued Liabilities [Abstract]  
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
Accrued Liabilities
 
Accrued liabilities consist of the following at December 31:
 
 
 
2013
 
2012
Salaries and benefits
 
$
7,527

 
$
8,444

Incentive compensation
 
3,497

 
4,210

Value Added Tax accrual
 
960

 
1,064

Other
 
3,567

 
4,092

 
 
$
15,551

 
$
17,810