Concentration of Credit Risk (Details) - customer	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Concentration Risk [Line Items]
Percentage of U.S. demand supplied by company	1.00%
Customer Concentration Risk | Revenues
Concentration Risk [Line Items]
Concentration risk, percentage	50.00%
Customer Concentration Risk | Revenues | Customer One
Concentration Risk [Line Items]
Concentration risk, percentage	24.00%	37.30%	27.30%
Customer Concentration Risk | Revenues | Customer Two
Concentration Risk [Line Items]
Concentration risk, percentage	10.80%	11.40%	14.10%
Customer Concentration Risk | Revenues | Minimum
Concentration Risk [Line Items]
Concentration risk, customers	3
Customer Concentration Risk | Revenues | Maximum
Concentration Risk [Line Items]
Concentration risk, customers	5
Customer Concentration Risk | Accounts Receivable | Customer One
Concentration Risk [Line Items]
Concentration risk, percentage	11.30%	16.60%	18.40%
Customer Concentration Risk | Accounts Receivable | Customer Two
Concentration Risk [Line Items]
Concentration risk, percentage	10.90%	12.60%	11.90%
Customer Concentration Risk | Accounts Receivable | Customer Three
Concentration Risk [Line Items]
Concentration risk, percentage	10.70%
Customer Concentration Risk | Accounts Receivable | Customer Four
Concentration Risk [Line Items]
Concentration risk, percentage	10.40%