Annual report pursuant to Section 13 and 15(d)

Accrued Expenses (Details)

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Accrued Expenses (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Schedule of Accrued Expenses [Line Items]      
Accrued compensation $ 548,953us-gaap_EmployeeRelatedLiabilitiesCurrent $ 249,160us-gaap_EmployeeRelatedLiabilitiesCurrent  
Warranty reserve 143,364us-gaap_ProductWarrantyAccrual 113,078us-gaap_ProductWarrantyAccrual 103,129us-gaap_ProductWarrantyAccrual
Other 80,802us-gaap_OtherAccruedLiabilitiesCurrent 98,955us-gaap_OtherAccruedLiabilitiesCurrent  
Accrued Liabilities, Current $ 773,119us-gaap_AccruedLiabilitiesCurrent $ 461,193us-gaap_AccruedLiabilitiesCurrent