XML 58 R44.htm IDEA: XBRL DOCUMENT v3.20.4
Concentration of Credit Risk and Significant Customers (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Sales Revenue, Net | Customer Concentration Risk      
Concentration of Credit Risk and Significant Customers [Abstract]      
Concentration risk, percentage 5.00% 5.00% 5.00%