Investments in Unconsolidated Joint Ventures (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Aug. 31, 2022	Mar. 31, 2021	May 04, 2018
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage							70.41%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 147,703,000		$ 147,703,000		$ 145,443,000
Assets	676,990,000		676,990,000		678,190,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	384,000	$ (113,000)	1,370,000	$ 41,043,000
Income (Loss) from Equity Method Investments	(1,878,000)	$ (1,244,000)	(5,248,000)	(3,997,000)
Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets	$ 552,423,000		552,423,000		480,544,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			(9,198,000)		(8,573,000)
Real Estate Partnership Net Income Loss [Member]
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments			$ (5,248,000)		$ (5,754,000)
Brooksville Quarry L L C [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%		50.00%		50.00%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 7,532,000		$ 7,532,000		$ 7,488,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			(66,000)		(82,000)
Income (Loss) from Equity Method Investments			(33,000)		(41,000)
Brooksville Quarry L L C [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets	$ 14,478,000		$ 14,478,000		$ 14,301,000
B C F R P Realty L L C [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%		50.00%		50.00%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 5,450,000		$ 5,450,000		$ 5,530,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			(185,000)		(230,000)
Income (Loss) from Equity Method Investments			(91,000)		(115,000)
B C F R P Realty L L C [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets	$ 22,088,000		$ 22,088,000		$ 22,470,000
Bryant Street Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	61.36%		61.36%		61.36%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 57,163,000		$ 57,163,000		$ 59,558,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			(7,132,000)		(6,084,000)
Income (Loss) from Equity Method Investments			(4,743,000)		(4,954,000)
Preferred interest				747,000
Amortization of guarantee liability			354,000	$ 354,000
Bryant Street Partnerships [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets	201,572,000		201,572,000		$ 204,082,000
Lending Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	16,563,000		16,563,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			0
Income (Loss) from Equity Method Investments
Lending Ventures [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets	$ 5,379,000		$ 5,379,000
D S T Hickory Creek [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	26.65%		26.65%		26.65%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 6,000,000		$ 6,000,000		$ 6,000,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			(420,000)		(481,000)
Income (Loss) from Equity Method Investments			281,000		343,000
D S T Hickory Creek [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets	$ 44,646,000		$ 44,646,000		$ 46,048,000
Estero Partnership [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	16.00%		16.00%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 3,600,000		$ 3,600,000			$ 3,600,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Income (Loss) from Equity Method Investments
Estero Partnership [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets	$ 38,500,000		$ 38,500,000
Half St Owner L L C [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	61.37%		61.37%		61.37%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 39,133,000		$ 39,133,000		$ 38,693,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			(487,000)		12,000
Income (Loss) from Equity Method Investments			(299,000)		20,000
Half St Owner L L C [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets	$ 129,140,000		$ 129,140,000		$ 93,932,000
Greenville Woodfield Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	40.00%		40.00%		40.00%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 12,262,000		$ 12,262,000		$ 16,194,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			(908,000)		(948,000)
Income (Loss) from Equity Method Investments			(363,000)		(379,000)
Greenville Woodfield Partnerships [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets	96,620,000		96,620,000		87,731,000
Riverfront Holdings I I L L C [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage								80.00%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures					0
Assets							$ 150,082,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest					(760,000)
Income (Loss) from Equity Method Investments					(628,000)
Riverfront Holdings I I L L C [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets	$ 0		$ 0		0
Aberdeen Station [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures					514,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest					0
Income (Loss) from Equity Method Investments					0
Aberdeen Station [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets					514,000
Amber Ridge Loan [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures					11,466,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest					0
Amber Ridge Loan [Member] | Real Estate Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Assets					$ 11,466,000