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Major Customer and Geographic Information (Schedule of Revenues from Non-affiliated Customers) (Details) - Revenue [Member]
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Customer A [Member]        
Revenue, Major Customer [Line Items]        
Risk percentage 65.00% 49.00% 47.00% 20.00%
Customer B [Member]        
Revenue, Major Customer [Line Items]        
Risk percentage 14.00% 22.00% 21.00% 64.00%
Customer C [Member]        
Revenue, Major Customer [Line Items]        
Risk percentage 11.00% 6.00% 6.00%