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Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]  
Schedule of the summary of the product warranty activity recorded during the period

September 30, 2012

September 30, 2011

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