Quarterly report pursuant to sections 13 or 15(d)

Accrued Expenses (Details 1)

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Accrued Expenses (Details 1) (USD $)
3 Months Ended
Mar. 31, 2014
Accrued Expenses [Abstract]  
Balance as of December 31, 2013 $ 514,000
Additional warranty liability accrued   
Warranty costs incurred (146,822)
Balance at March 31, 2014 $ 367,178