Product Warranty (Details Textual) (USD $) In Thousands, unless otherwise specified			9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Minimum [Member]	Sep. 30, 2013 Maximum [Member]
Product Warranty (Textual) [Abstract]
Limited warranty period on product			1 year	2 years
Accrued product warranty costs	$ 1,010	$ 814