Foreign Currency Translation (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue from external customers
Net sales	$ 68,911	$ 60,919	$ 207,074	$ 180,124
Foreign operations
Revenue from external customers
Net sales	$ 13,100	$ 5,000	$ 45,100	$ 16,600

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details