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Related Party Loan (Details) - Unit holder of Parent - USD ($) |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Aug. 22, 2018 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Senior Secured Loan |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Balance of Senior Secured Loan |  |  |  |  |  | $ 41,800,000
Interest expense |  | $ 300,000 | $ 500,000 | $ 3,800,000 | $ 4,100,000 |
Senior Secured Loan | Secured Debt |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Senior secured promissory note | $ 38,600,000 |  |  |  |  |
Stated rate | 12.00% |  |  |  |  |
Tranche A | Secured Debt |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Senior secured promissory note | $ 22,500,000 |  |  |  |  |
Tranche B | Secured Debt |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Senior secured promissory note | $ 16,100,000 |  |  |  |  |

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