Summary of Signinficant Accounting Policies - Schedule of Fee and Other Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 6,140	$ 6,271	$ 10,560
Other property income	2,041	2,282	4,406
Total fee and other income	8,181	8,553	14,966
Asset and Property Management Fees [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	5,150	5,692	7,845
Leasing commission and development fees [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	167	429	1,856
Shared services fee from Curbline [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	723	0	0
Disposition, asset and property management fees from RVI [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 100	$ 150	$ 859