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Significant Risks and Uncertainties Including Business and Credit Concentrations (Tables)
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Risks and Uncertainties [Abstract]    
Summary of concentration risk
The concentration of net revenue on a percentage basis for major payors for the three and six months ended June 30, 2022 and 2021 are as follows:

Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
Percentage of Net Revenue: 
Payor A14 %17 %15 %17 %
Payor B17 %14 %17 %14 %
The concentration of gross receivables on a percentage basis for major payors at June 30, 2022 and December 31, 2021 are as follows:
June 30, 2022December 31, 2021
Percentage of Gross Receivables: 
Payor B19 %19 %
Payor C13 %14 %
The concentration of cost of sales on a percentage basis for major vendors for the three and six months ended June 30, 2022 and 2021 are as follows:
Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
Percentage of Cost of Sales: 
Vendor A55 %50 %54 %49 %
Vendor B43 %48 %44 %49 %
The concentration of gross payables on a percentage basis for major payors at June 30, 2022 and December 31, 2021 are as follows:
June 30, 2022December 31, 2021
Percentage of Gross Payables:
Vendor B45 %47 %
Vendor A33 %39 %
The concentration of net revenue on a percentage basis for major payors at December 31, 2021 and 2020 are as follows:

Year Ended December 31,
20212020
Percentage of Net Revenue: 
Payor A17 %15 %
Payor B14 %15 %
The concentration of gross receivables on a percentage basis for major payors at December 31, 2021 and 2020 are as follows:
December 31, 2021December 31, 2020
Percentage of Gross Receivables: 
Payor B19 %11 %
Payor C14 %21 %
All of the Company’s revenue is generated from Customers located in the United States.
Vendor Concentration Risk
The concentration of cost of sales on a percentage basis for major vendors at December 31, 2021 and 2020 are as follows:
Year Ended December 31,
20212020
Percentage of Cost of Sales: 
Vendor A50 %55 %
Vendor B48 %45 %
The concentration of gross payables on a percentage basis for major payors at December 31, 2021 and 2020 are as follows:
December 31, 2021December 31, 2020
Percentage of Gross Payables:
Vendor B47 %48 %
Vendor A39 %42 %
All others14 %10 %