Description of Business and Basis of Presentation (Details Textual) (USD $)	9 Months Ended
	Sep. 30, 2012 Segment manufacturing_location
Description of Business and Basis of Presentation (Textual) [Abstract]
Manufacturing locations	2
Operating segments	1
Warranty period, minimum, in years	1 year
Warranty period, maximum, in years	2 years
Additional paid in capital increase	$ 14,200,000
Amount associated with stock-based compensation plans	4,300,000
Repurchase of shares	$ (318,000)