Investments in Unconsolidated Joint Ventures - Balance sheet (Details) - USD ($)	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
ASSETS
Real estate, net			$ 62,324,000
Residential condominium units for sale			184,561,000
Cash and cash equivalents	$ 854,000		264,000	$ 4,395,000	$ 1,548,000
Restricted cash	1,643,000		8,081,000	$ 11,020,000	$ 20,507,000
Prepaid expenses and other assets, net	158,000		2,774,000
Intangible assets, net			6,952,000
Total assets	4,467,000		267,508,000
LIABILITIES
Loans payable, net			194,628,000
Corporate credit facility, net			40,791,000
Secured line of credit			11,750,000
Accounts payable and accrued expenses	656,000		28,273,000
Total liabilities	2,641,000	$ 2,713,000	277,556,000
MEMBERS' EQUITY
Accumulated deficit	(88,778,000)	(87,052,000)	(95,905,000)
Total liabilities and members' deficit	4,467,000	$ 6,163,000	267,508,000
Our investments in unconsolidated joint ventures	0		$ 0
Unconsolidated Joint Ventures
ASSETS
Real estate, net	90,647,000
Residential condominium units for sale	174,340,000
Cash and cash equivalents	137,000
Restricted cash	10,910,000
Tenant and other receivables, net	603,000
Prepaid expenses and other assets, net	396,000
Intangible assets, net	6,582,000
Total assets	283,615,000
LIABILITIES
Loans payable, net	219,772,000
Corporate credit facility, net	53,953,000
Secured line of credit	11,725,000
Accounts payable and accrued expenses	8,587,000
Total liabilities	294,037,000
MEMBERS' EQUITY
Members' equity	6,276,000
Accumulated deficit	(16,698,000)
Total members' deficit	(10,422,000)
Total liabilities and members' deficit	$ 283,615,000