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Major Customer and Geographic Information (Non-affiliated Customers) (Details) - Revenue [Member]
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Customer A [Member]    
Revenue, Major Customer [Line Items]    
Risk percentage 62.00% 55.00%
Customer B [Member]    
Revenue, Major Customer [Line Items]    
Risk percentage 16.00% 18.00%