Real Estate, Net - Additional Information (Details)	1 Months Ended	3 Months Ended		12 Months Ended
	May 31, 2018 USD ($)	Mar. 31, 2022 USD ($) item	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) item	Dec. 31, 2017 USD ($)
Real Estate [Line Items]
Depreciation		$ 693,000	$ 693,000
Percentage of property leased		100.00%
Finite-Lived Intangible Assets, Net		$ 11,100,000		$ 11,100,000
Accumulated amortization		2,900,000		$ 2,700,000
Amortization of Intangible Assets		185,000	$ 185,000
Aggregate fees paid by SCA to the Company		46,100,000
Remaining fees to be paid by SCA to the Company		430,000
SCA [Member]
Real Estate [Line Items]
Contract Receivable		41,500,000
Construction Supervision Fee receivable		5,000,000.0
Construction Costs Reimbursed		$ 51,000,000.0
Greenwich Ny 77 [Member]
Real Estate [Line Items]
Debt Instrument, Face Amount					$ 189,500,000
Number of residential condominium units closed | item		3		14
237 11th Property
Real Estate [Line Items]
Purchase price of property	$ 81,200,000
Business Acquisition, Transaction Costs	$ 700,000