Significant Accounting Policies - Assessment of Revenue under ASC 606 (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 68,165	$ 53,647	$ 128,132	$ 115,383
Cost of sales	12,760	8,198	22,401	18,223
Gross Profit	55,405	45,449	105,731	97,160
Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	313	1,706	611	6,201
Cost of sales	44	239	86	868
Gross Profit	$ 269	$ 1,467	$ 525	$ 5,333