Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net revenue	$ 137,373	$ 104,091	$ 407,906	$ 280,881
E-commerce
Disaggregation of Revenue [Line Items]
Net revenue	58,199	65,556	194,859	174,369
Retail
Disaggregation of Revenue [Line Items]
Net revenue	79,174	38,535	213,047	106,512
Eyewear products
Disaggregation of Revenue [Line Items]
Net revenue	133,037	101,303	395,329	273,043
Services and other
Disaggregation of Revenue [Line Items]
Net revenue	$ 4,336	$ 2,788	$ 12,577	$ 7,838