XML 82 R68.htm IDEA: XBRL DOCUMENT v3.8.0.1
Product Warranty Provisions (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Product Warranty Provisions [Abstract]    
Standard product warranty coverage term 1 year  
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