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Market Concentrations (Tables)
12 Months Ended
Dec. 31, 2020
Risks and Uncertainties [Abstract]  
Schedule of revenues concentration from major customers Total revenues by customer for each customer representing 10% or more of consolidated revenues are summarized below for the years ended December 31:
202020192018
Customer 125%31%28%
Customer 225%28%25%
Customer 321%17%26%
*: less than 10% of total