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Major Customer and Geographic Information (Schedule of Revenues from Non-affiliated Customers) (Details) - Revenue Benchmark [Member]
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]        
Risk percentage 24.00% 74.00% 47.00% 65.00%
Customer B [Member]        
Revenue, Major Customer [Line Items]        
Risk percentage 3.00% 11.00% 10.00%
Customer C [Member]        
Revenue, Major Customer [Line Items]        
Risk percentage 43.00% 10.00% 24.00% 12.00%