Quarterly report pursuant to Section 13 or 15(d)

Warranty (Details)

v3.19.2
Warranty (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Warranty [Abstract]    
Product warranty period 5 years  
Beginning balance $ 594 $ 603
Amounts charged (credited) to expense (21) 88
Actual warranty costs paid (19) (57)
Ending balance $ 554 $ 634