Quarterly report pursuant to Section 13 or 15(d)

Warranty (Details)

v3.8.0.1
Warranty (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Warranty [Abstract]    
Product Warranty Period 5 years  
Beginning balance $ 600 $ 554
Amounts charged to expense 43 119
Actual warranty costs paid (57) (75)
Ending balance $ 586 $ 598