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Product Warranty Provisions (Tables)
 12 Months Ended
Dec. 31, 2017
Product Warranty Provisions [Abstract]  
Schedule Of Accrued Warranty



 

 

 

 

 

 



 

December 31, 2017

 

December 31, 2016

Warranty accrual, beginning of the fiscal period

 

$

 222,845 

 

$

 316,835 

Accrual adjustment for product warranty

 

 

 32,679 

 

 

 103,743 

Payments made

 

 

 (91,159)

 

 

 (197,733)

Warranty accrual, end of the fiscal period

 

$

 164,365 

 

$

 222,845