Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

The following is a summary of the change in the Company's warranty accrual reserve (in thousands):

	Nine Months Ended
	September 30,
	2016			2015
Warranty liability balance, beginning of the period	$	2,553		$	2,600
Product warranty accruals	985			1,607
Utilization of accrual	(1,489		)	(1,593		)
Warranty liability balance, end of the period	$	2,049		$	2,614