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Commitments and Contingencies (Details) (USD $)	9 Months Ended
Commitments and Contingencies (Details) (USD $)	Sep. 30, 2012	Sep. 30, 2011
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning balance - January 1	$ 1,210,919	$ 862,480
Additions for current year deliveries	399,623	569,452
Reductions for payments made	(1,915,253)	(398,966)
Reserve Adjustment	3,273,324	561,750
Ending balance - September 30	$ 2,968,613	$ 1,594,716

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References+ Details