Summary of Significant Accounting Policies - Net Revenue Disaggregated by Product Categories (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation Of Revenue [Line Items]
Total net revenue	$ 58,783	$ 40,603	$ 144,212	$ 88,817
Product Revenue
Disaggregation Of Revenue [Line Items]
Total net revenue	58,443	40,285	143,166	87,569
Product Revenue | Environmental Appliances (i.e., Dehumidifiers and Air Conditioners)
Disaggregation Of Revenue [Line Items]
Total net revenue	35,241	27,083	83,103	52,757
Product Revenue | Small Home Appliances
Disaggregation Of Revenue [Line Items]
Total net revenue	6,471	8,100	20,584	17,426
Product Revenue | Cosmetics, Skincare, and Health Supplements
Disaggregation Of Revenue [Line Items]
Total net revenue	2,626	2,569	8,989	8,346
Product Revenue | Personal Protective Equipment
Disaggregation Of Revenue [Line Items]
Total net revenue	8,830		14,557
Product Revenue | Cookware, Kitchen Tools and Gadgets
Disaggregation Of Revenue [Line Items]
Total net revenue	1,433	1,320	4,491	5,279
Product Revenue | Hair Appliances and Accessories
Disaggregation Of Revenue [Line Items]
Total net revenue	719	732	3,636	2,590
Product Revenue | All Others
Disaggregation Of Revenue [Line Items]
Total net revenue	3,123	481	7,806	1,171
Managed SaaS
Disaggregation Of Revenue [Line Items]
Total net revenue	$ 340	$ 318	$ 1,046	$ 1,248