Quarterly report pursuant to Section 13 or 15(d)

Warranty (Details)

v3.19.3
Warranty (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Warranty [Abstract]    
Product warranty period 5 years  
Beginning balance $ 594 $ 603
Amounts charged (credited) to expense (40) 116
Actual warranty costs paid (28) (75)
Ending balance $ 526 $ 644