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Entity Level Information - Percentage of Total Revenues (Details) - Revenues - Customer Concentration | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Concentration risk percentage | 80.00% | 86.00%
Customer A |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Concentration risk percentage | 34.00% | 25.00%
Customer B |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Concentration risk percentage | 13.00% | 17.00%
Customer C |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Concentration risk percentage |  | 17.00%
Customer D |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Concentration risk percentage | 11.00% | 12.00%
Customer E |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |
Concentration risk percentage | 22.00% | 15.00%

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