Quarterly report pursuant to Section 13 or 15(d)

Foreign Currency Translation (Details)

v3.10.0.1
Foreign Currency Translation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Revenue from external customers        
Net sales $ 47,923 $ 39,018 $ 132,389 $ 116,130
Foreign operations        
Revenue from external customers        
Net sales $ 4,000 $ 4,600 $ 13,900 $ 14,100