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Summary of Significant Accounting Policies (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
% Revenues [Member]    
Total 100.00% 100.00%
% Revenues [Member] | Major [Member]    
Total 32.00% 37.70%
% Revenues [Member] | All Others [Member]    
Total 68.00% 62.30%
% AR [Member]    
Total 100.00% 100.00%
% AR [Member] | Major [Member]    
Total 50.20% 45.60%
% AR [Member] | All Others [Member]    
Total 49.80% 54.40%