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Equipment and Leasehold Improvements (Tables)
12 Months Ended
Dec. 31, 2015
Equipment and Leasehold Improvements [Abstract]  
Property, Plant and Equipment [Table Text Block]
 
 
December 31,
 
 
 
2015
 
2014
 
Equipment
 
$
27,757
 
$
26,006
 
Leasehold improvements
 
 
1,631
 
 
1,581
 
 
 
 
29,388
 
 
27,587
 
Less accumulated depreciation and amortization
 
 
20,055
 
 
18,400
 
 
 
$
9,333
 
$
9,187