Summary of Significant Accounting Policies - Net Revenue Disaggregated by Product Categories (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation Of Revenue [Line Items]
Total net revenue	$ 25,628	$ 17,846
Product Revenue
Disaggregation Of Revenue [Line Items]
Total net revenue	25,267	17,313
Product Revenue | Environmental Appliances (i.e., Dehumidifiers and Air Conditioners)
Disaggregation Of Revenue [Line Items]
Total net revenue	13,270	6,563
Product Revenue | Small Home Appliances
Disaggregation Of Revenue [Line Items]
Total net revenue	5,635	4,230
Product Revenue | Cosmetics, Skincare, and Health Supplements
Disaggregation Of Revenue [Line Items]
Total net revenue	3,368	3,167
Product Revenue | Cookware, Kitchen Tools and Gadgets
Disaggregation Of Revenue [Line Items]
Total net revenue	989	2,039
Product Revenue | Hair Appliances and Accessories
Disaggregation Of Revenue [Line Items]
Total net revenue	1,041	1,074
Product Revenue | All Others
Disaggregation Of Revenue [Line Items]
Total net revenue	964	240
Managed SaaS
Disaggregation Of Revenue [Line Items]
Total net revenue	$ 361	$ 533