Quarterly report pursuant to Section 13 or 15(d)

Warranty (Details)

v3.7.0.1
Warranty (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Warranty [Abstract]    
Product Warranty Period 5 years  
Beginning balance $ 600 $ 554
Amounts charged to expense (5) 19
Actual warranty costs paid (14) (34)
Ending balance $ 581 $ 539