Concentrations (Details)	12 Months Ended
	Dec. 31, 2020 item customer	Dec. 31, 2019 customer item	Dec. 31, 2018 item customer
Customer | Revenue
Concentrations
Number of customers | customer	1	2	3
Concentration risk (as a percent)	14.00%
Customer | Revenue | Customer One
Concentrations
Concentration risk (as a percent)		19.00%	15.00%
Customer | Revenue | Customer Two
Concentrations
Concentration risk (as a percent)		10.00%	10.00%
Customer | Revenue | Customer Three
Concentrations
Concentration risk (as a percent)			10.00%
Customer | Accounts receivable
Concentrations
Number of customers | customer	4	1
Concentration risk (as a percent)	42.00%	15.00%
Supplier | Purchases
Concentrations
Number of suppliers | item	1	1	2
Concentration risk (as a percent)	24.00%	19.00%
Supplier | Purchases | Supplier One
Concentrations
Concentration risk (as a percent)			13.00%
Supplier | Purchases | Supplier Two
Concentrations
Concentration risk (as a percent)			11.00%
Supplier | Accounts payables
Concentrations
Number of suppliers | item	2	1
Concentration risk (as a percent)		44.00%
Supplier | Accounts payables | Supplier One
Concentrations
Concentration risk (as a percent)	13.00%
Supplier | Accounts payables | Supplier Two
Concentrations
Concentration risk (as a percent)	10.00%