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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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Initial Investment in Joint Venture.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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