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Investment In Joint Venture - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Joint venture investment payments |  |  | $ 2,000 | $ 1,600 |  |
Allocable share of losses recorded | $ (332) | $ (526) | (1,282) | (1,009) |  |
Investment in joint venture | 1,028 |  | $ 1,028 |  | $ 310 |
RE Ventures I, LLC |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Percentage of interest of joint venture entity |  |  | 50.00% |  |  |
Allocable share of losses recorded | 300 | $ 500 | $ 1,300 | $ 1,000 |  |
Investment in joint venture | $ 1,000 |  | $ 1,000 |  | $ 300 |
RE Ventures I, LLC | Accrued Expenses |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Initial Investment in Joint Venture |  |  |  |  |  | $ 600

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