Quarterly report pursuant to Section 13 or 15(d)

Warranty (Details)

v3.10.0.1
Warranty (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Warranty [Abstract]    
Product warranty period 5 years  
Beginning balance $ 603 $ 600
Amounts charged (credited) to expense 116 43
Actual warranty costs paid (75) (57)
Ending balance $ 644 $ 586