Foreign Currency Translation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from external customers
Net sales	$ 60,919	$ 52,363	$ 180,124	$ 147,897
Foreign operations
Revenue from external customers
Net sales	$ 5,000	$ 4,200	$ 16,600	$ 13,600