Product Warranties (Tables)

3 Months Ended

Mar. 31, 2014

Product Warranties [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

The following table represents changes in the Company’s consolidated warranty reserve:

Balance at December 31, 2013	$	33,827
Warranty expense	4,061
Warranty usage	(7,053		)
Balance at March 31, 2014	$	30,835