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The following tables provide the percentage of total revenues for the three and nine months ended September 30, 2021 and 2020 to a single customer from which 10% or more of total revenues are derived (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member] - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Customer A [Member]        
Revenue, Major Customer [Line Items]        
Revenues $ 2,635,000 $ 1,863,000 $ 6,819,000 $ 5,596,000
Concentration Risk, Percentage 9.00% 33.00% 15.00% 34.00%
Customer B [Member]        
Revenue, Major Customer [Line Items]        
Revenues   $ 1,065,000   $ 2,661,000
Concentration Risk, Percentage   19.00%   16.00%