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Concentration of Credit Risk and Significant Customers (Tables)
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Risks and Uncertainties [Abstract]    
Schedules of concentration of risk, by risk factor
Significant customers are those that represent 10% or more of revenue or accounts receivable and are set forth in the following table:
Revenue for the Nine Months Ended September 30,Accounts Receivable As of
20202019September 30, 2020December 31, 2019
Customer A67.3%14.6%44.0%60.0%
Customer B26.0%51.1%36.1%20.4%
Customer A is a related party and Customer B is a government agency.
Significant customers are those that represent 10% or more of revenue or accounts receivable and are set forth in the following:

Revenue for the Year Ended December 31,Accounts Receivable As of December 31,
2019201820192018
Customer A*44.0%*22.7%
Customer B*17.6%*43.7%
Customer C*16.0%**
Customer D79.6%*60.0%19.3%
Customer E13.3%*20.4%*

*    Less than 10% of total