Concentration of Risk (Details) - customer	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Total revenue | Customer concentration risk
Concentration of Risk
Number of customers	2	1
Total revenue | Customer concentration risk | First customer
Concentration of Risk
Percentage of concentration risk	15.00%	29.60%
Total revenue | Customer concentration risk | Second customer
Concentration of Risk
Percentage of concentration risk	11.10%
Accounts receivable | Credit concentration risk
Concentration of Risk
Number of customers	3		2
Accounts receivable | Credit concentration risk | First customer
Concentration of Risk
Percentage of concentration risk	19.10%		29.10%
Accounts receivable | Credit concentration risk | Second customer
Concentration of Risk
Percentage of concentration risk	16.60%		13.60%
Accounts receivable | Credit concentration risk | Third customer
Concentration of Risk
Percentage of concentration risk	10.30%