Quarterly report pursuant to Section 13 or 15(d)

Warranty (Details)

v3.7.0.1
Warranty (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Warranty [Abstract]    
Product Warranty Period 5 years  
Beginning balance $ 600 $ 554
Amounts charged to expense 25 78
Actual warranty costs paid (35) (58)
Ending balance $ 590 $ 574