Product Warranty Provisions (Tables)

9 Months Ended

Sep. 30, 2012

Product Warranty Provisions [Abstract]

Schedule Of Accrued Warranty

	September 30,
	2012
Warranty accrual, December 31, 2011	$ 691,832
Warranty expense incurred	449,401
Payments made	(575,801)
Warranty accrual, September 30, 2012	$ 565,432