SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION - Schedule of Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 181,856
Initial cost, land	150,138
Initial cost, buildings	370,889
Cost Capitalized Subsequent to Acquisition	115,154
Gross amount, land	168,177
Gross amount, building & improvements	468,004
Gross amount, total	636,181	$ 568,951	$ 559,875	$ 359,296
Accumulated Depreciation	78,793	$ 67,365	$ 66,054	$ 62,933
Multifamily
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	160,086
Initial cost, land	56,140
Initial cost, buildings	279,186
Cost Capitalized Subsequent to Acquisition	93,657
Gross amount, land	72,948
Gross amount, building & improvements	356,035
Gross amount, total	428,983
Accumulated Depreciation	28,720
Multifamily | Alera
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,554
Initial cost, land	0
Initial cost, buildings	0
Cost Capitalized Subsequent to Acquisition	36,583
Gross amount, land	6,064
Gross amount, building & improvements	30,519
Gross amount, total	36,583
Accumulated Depreciation	0
Multifamily | Bandera Ridge
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost, land	0
Initial cost, buildings	0
Cost Capitalized Subsequent to Acquisition	26,273
Gross amount, land	2,700
Gross amount, building & improvements	23,573
Gross amount, total	26,273
Accumulated Depreciation	0
Multifamily | Blue Lake Villas
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,327
Initial cost, land	6,920
Initial cost, buildings	27,680
Cost Capitalized Subsequent to Acquisition	219
Gross amount, land	6,920
Gross amount, building & improvements	27,899
Gross amount, total	34,819
Accumulated Depreciation	1,517
Multifamily | Blue Lake Villas Phase II
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	3,271
Initial cost, land	2,400
Initial cost, buildings	9,600
Cost Capitalized Subsequent to Acquisition	53
Gross amount, land	2,400
Gross amount, building & improvements	9,653
Gross amount, total	12,053
Accumulated Depreciation	523
Multifamily | Chelsea
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,878
Initial cost, land	1,225
Initial cost, buildings	11,230
Cost Capitalized Subsequent to Acquisition	53
Gross amount, land	1,231
Gross amount, building & improvements	11,277
Gross amount, total	12,508
Accumulated Depreciation	1,794
Multifamily | Forest Grove
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,421
Initial cost, land	1,440
Initial cost, buildings	10,234
Cost Capitalized Subsequent to Acquisition	64
Gross amount, land	1,440
Gross amount, building & improvements	10,298
Gross amount, total	11,738
Accumulated Depreciation	1,191
Multifamily | Landing on Bayou Cane
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	14,162
Initial cost, land	2,011
Initial cost, buildings	18,255
Cost Capitalized Subsequent to Acquisition	122
Gross amount, land	2,011
Gross amount, building & improvements	18,377
Gross amount, total	20,388
Accumulated Depreciation	2,421
Multifamily | Legacy at Pleasant Grove
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	12,381
Initial cost, land	2,005
Initial cost, buildings	18,109
Cost Capitalized Subsequent to Acquisition	116
Gross amount, land	2,033
Gross amount, building & improvements	18,197
Gross amount, total	20,230
Accumulated Depreciation	5,127
Multifamily | Merano
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost, land	0
Initial cost, buildings	0
Cost Capitalized Subsequent to Acquisition	24,828
Gross amount, land	4,500
Gross amount, building & improvements	20,328
Gross amount, total	24,828
Accumulated Depreciation	0
Multifamily | Mountain Creek
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost, land	0
Initial cost, buildings	0
Cost Capitalized Subsequent to Acquisition	5,037
Gross amount, land	3,510
Gross amount, building & improvements	1,527
Gross amount, total	5,037
Accumulated Depreciation	0
Multifamily | Northside on Travis
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	11,125
Initial cost, land	7,160
Initial cost, buildings	28,640
Cost Capitalized Subsequent to Acquisition	14
Gross amount, land	7,160
Gross amount, building & improvements	28,654
Gross amount, total	35,814
Accumulated Depreciation	1,552
Multifamily | Parc at Denham Springs
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	16,048
Initial cost, land	6,060
Initial cost, buildings	24,240
Cost Capitalized Subsequent to Acquisition	29
Gross amount, land	6,060
Gross amount, building & improvements	24,269
Gross amount, total	30,329
Accumulated Depreciation	1,318
Multifamily | Parc at Denham Springs Phase II
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	15,419
Initial cost, land	1,505
Initial cost, buildings	16,975
Cost Capitalized Subsequent to Acquisition	0
Gross amount, land	1,505
Gross amount, building & improvements	16,975
Gross amount, total	18,480
Accumulated Depreciation	2,186
Multifamily | Residences at Holland Lake
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,219
Initial cost, land	6,300
Initial cost, buildings	25,200
Cost Capitalized Subsequent to Acquisition	51
Gross amount, land	6,300
Gross amount, building & improvements	25,251
Gross amount, total	31,551
Accumulated Depreciation	1,373
Multifamily | Villas at Bon Secour
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	18,798
Initial cost, land	2,715
Initial cost, buildings	15,385
Cost Capitalized Subsequent to Acquisition	87
Gross amount, land	2,715
Gross amount, building & improvements	15,472
Gross amount, total	18,187
Accumulated Depreciation	2,491
Multifamily | Villas of Park West I
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,983
Initial cost, land	8,200
Initial cost, buildings	32,800
Cost Capitalized Subsequent to Acquisition	100
Gross amount, land	8,200
Gross amount, building & improvements	32,900
Gross amount, total	41,100
Accumulated Depreciation	1,783
Multifamily | Villas of Park West II
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,158
Initial cost, land	6,860
Initial cost, buildings	27,440
Cost Capitalized Subsequent to Acquisition	22
Gross amount, land	6,860
Gross amount, building & improvements	27,462
Gross amount, total	34,322
Accumulated Depreciation	1,487
Multifamily | Vista Ridge
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,342
Initial cost, land	1,339
Initial cost, buildings	13,398
Cost Capitalized Subsequent to Acquisition	6
Gross amount, land	1,339
Gross amount, building & improvements	13,404
Gross amount, total	14,743
Accumulated Depreciation	3,957
Commercial
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,939
Initial cost, land	27,783
Initial cost, buildings	91,703
Cost Capitalized Subsequent to Acquisition	20,242
Gross amount, land	27,759
Gross amount, building & improvements	111,969
Gross amount, total	139,728
Accumulated Depreciation	50,073
Commercial | 770 South Post Oak
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,939
Initial cost, land	1,763
Initial cost, buildings	16,312
Cost Capitalized Subsequent to Acquisition	1,537
Gross amount, land	1,763
Gross amount, building & improvements	17,849
Gross amount, total	19,612
Accumulated Depreciation	4,473
Commercial | Browning Place
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost, land	5,096
Initial cost, buildings	49,441
Cost Capitalized Subsequent to Acquisition	15,054
Gross amount, land	5,096
Gross amount, building & improvements	64,495
Gross amount, total	69,591
Accumulated Depreciation	32,392
Commercial | Stanford Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost, land	20,278
Initial cost, buildings	25,876
Cost Capitalized Subsequent to Acquisition	3,749
Gross amount, land	20,278
Gross amount, building & improvements	29,625
Gross amount, total	49,903
Accumulated Depreciation	13,208
Commercial | Other
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost, land	646
Initial cost, buildings	74
Cost Capitalized Subsequent to Acquisition	(98)
Gross amount, land	622
Gross amount, building & improvements	0
Gross amount, total	622
Accumulated Depreciation	0
Developed and Undeveloped Land
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	10,831
Initial cost, land	66,215
Initial cost, buildings	0
Cost Capitalized Subsequent to Acquisition	1,255
Gross amount, land	67,470
Gross amount, building & improvements	0
Gross amount, total	67,470
Accumulated Depreciation	0
Developed and Undeveloped Land | Mercer Crossing
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial cost, land	2,999
Initial cost, buildings	0
Cost Capitalized Subsequent to Acquisition	(166)
Gross amount, land	2,833
Gross amount, building & improvements	0
Gross amount, total	2,833
Accumulated Depreciation	0
Developed and Undeveloped Land | Windmill Farms
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,395
Initial cost, land	43,608
Initial cost, buildings	0
Cost Capitalized Subsequent to Acquisition	3,717
Gross amount, land	47,325
Gross amount, building & improvements	0
Gross amount, total	47,325
Accumulated Depreciation	0
Developed and Undeveloped Land | Other
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,436
Initial cost, land	19,608
Initial cost, buildings	0
Cost Capitalized Subsequent to Acquisition	(2,296)
Gross amount, land	17,312
Gross amount, building & improvements	0
Gross amount, total	17,312
Accumulated Depreciation	$ 0