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Accounts Receivable and Revenue Concentration (Tables)
3 Months Ended
Mar. 31, 2022
Receivables [Abstract]  
Schedule of concentration of risk
The following table is a summary of concentration of credit risk by customer revenues as a percentage of our total revenue:

Three Months Ended
March 31,
Percentage of Revenue20222021
Customer A48.3 %7.0 %
Customer B24.0 4.0 
Customer C18.5 2.2 
Customer D 4.4 45.8 
Customer E — 38.4 
Remaining customers4.8 2.6 
100.0 %100.0 %

The following table is a summary of concentration of credit risk by customer accounts receivables as a percentage of our total accounts receivable:

Percentage of Accounts Receivable
March 31, 2022
December 31, 2021
Customer D (1)85.0 %94.0 %
Customer A14.1 — 
Remaining customers0.9 6.0 
100.0 %100.0 %
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(1) Approximately 95% of the outstanding accounts receivable balance for this customer at March 31, 2022 has been received as of the date of this Form 10-Q. We continue to expect full payment of the remaining uncollected portion.