Business (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) item	Aug. 14, 2023 item	Apr. 30, 2023 USD ($)	Apr. 27, 2023	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Total cash and restricted cash	$ 15,415				$ 22,055	$ 16,391	$ 24,845
Cash and cash equivalents	4,395				1,548	3,112	4,310
Restricted cash	$ 11,020				$ 20,507	$ 13,279	$ 20,535
Corporate Credit Facility
Principal amount of debt deferred			$ 7,000
Amount of the debt to be prepaid by a specified date if strategic transaction is entered into			5,000
Amount of the debt to be prepaid by a specified date if no strategic transaction is entered into			$ 5,000
Interest rate (as a percent)				2.50%
Secured Line of Credit
Interest rate (as a percent)			2.50%
Greenwich NY 77
Number of additional residential condominium units closed or under contract | item	7
Number of residential condominium units closed or under contract to date | item	35
Greenwich NY 77 | Subsequent Event
Number of residential condominium units closed or under contract to date | item		2
Federal
Operating Loss Carryforwards	$ 293,400