Business Segment, Geographic and Major Customer Information - Major Customers (Details) - Customer Concentration Risk - Sales	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Customer A
Segment Reporting Information
Percentage of revenue by major customers (in percentage)	34.90%	11.10%	19.30%
Customer B
Segment Reporting Information
Percentage of revenue by major customers (in percentage)	14.10%	35.90%	24.70%	16.70%
Customer C
Segment Reporting Information
Percentage of revenue by major customers (in percentage)				12.30%