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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2015
Commitments and Contingencies [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
Changes in the Company’s warranty reserves are as follows:
 
Year Ended December 31,
 
2015

2014

2013
Balance, beginning of the year
$
1,574


$
1,551


$
2,024

Accruals
2,640


2,048


1,956

Usage
(2,320
)

(2,025
)

(2,429
)
Balance, end of the year
$
1,894


$
1,574


$
1,551