Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2012

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):

	For the Six Months Ended
	June 30,
	2012			2011
Warranty liability balance, beginning of the period	$	3,438		$	3,025
Product warranty accruals	1,759			1,286
Utilization of accrual	(2,301		)	(1,521		)
Warranty liability balance, end of the period	$	2,896		$	2,790