Commitments and Contingencies - (Tables)

9 Months Ended

Sep. 30, 2014

Commitments and Contingencies [Abstract]

Schedule of changes product warranty liability [Table Text Block]

Changes in the Company’s warranty reserves are as follows:

	Nine Months Ended September 30,
	2014		2013
Balance, beginning of the period	$	1,551	$	2,024
Accruals	1,471		1,511
Less: Usage	1,527		2,018
Balance, end of the period	$	1,495	$	1,517