Concentrations and Risks (Tables)

12 Months Ended

Dec. 31, 2021

Revenues | Customer risk

Concentration Risk [Line Items]

Summary of concentration of risk

	For the year ended
	December 31,
Revenues	2019		2020		2021
Customer B	31	%	32	%	*

Accounts receivable | Customer risk

Concentration Risk [Line Items]

Summary of concentration of risk

	As of
	December 31,
Accounts receivable	2020		2021
Customer A	11	%	*
Customer B	39	%	55	%

Costs and expenses | Supplier risk

Concentration Risk [Line Items]

Summary of concentration of risk

	For the year ended
	December 31,
Costs and expenses	2019		2020		2021
Supplier C	27	%	22	%	*

Accounts payable | Supplier risk

Concentration Risk [Line Items]

Summary of concentration of risk

	For the year ended
	December 31,
Costs and expenses	2019		2020		2021
Supplier C	27	%	22	%	*

* Less than 10%