Segment Information - Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Net sales to unaffiliated customers and identifiable assets by geographic areas
Identifiable Assets by Geographic Areas	$ 177,710	$ 165,533
USA
Net sales to unaffiliated customers and identifiable assets by geographic areas
Identifiable Assets by Geographic Areas	108,954	114,126
Canada
Net sales to unaffiliated customers and identifiable assets by geographic areas
Identifiable Assets by Geographic Areas	24,691	18,514
Europe and United Kingdom
Net sales to unaffiliated customers and identifiable assets by geographic areas
Identifiable Assets by Geographic Areas	23,686	13,301
Rest of the world
Net sales to unaffiliated customers and identifiable assets by geographic areas
Identifiable Assets by Geographic Areas	$ 20,379	$ 19,592