SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION - Schedule of Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 252,048
Land	108,435
Buildings	225,151
Cost Capitalized Subsequent to Acquisition	25,710
Land	118,604
Building & Improvements	240,692
Total	359,296	$ 459,801	$ 477,963	$ 463,732
Accumulated Depreciation	62,933	$ 82,418	$ 90,173	$ 79,228
Multifamily
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	111,256
Land	14,437
Buildings	133,448
Cost Capitalized Subsequent to Acquisition	(5,402)
Land	14,843
Building & Improvements	127,640
Total	142,483
Accumulated Depreciation	16,407
Multifamily | Chelsea
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,037
Land	1,225
Buildings	11,230
Cost Capitalized Subsequent to Acquisition	17
Land	1,231
Building & Improvements	11,241
Total	12,472
Accumulated Depreciation	893
Multifamily | Forest Grove
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,263
Land	1,440
Buildings	10,234
Cost Capitalized Subsequent to Acquisition	32
Land	1,440
Building & Improvements	10,266
Total	11,706
Accumulated Depreciation	410
Multifamily | Landing Bayou
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	14,407
Land	2,011
Buildings	18,255
Cost Capitalized Subsequent to Acquisition	(5,962)
Land	2,011
Building & Improvements	12,293
Total	14,304
Accumulated Depreciation	1,425
Multifamily | Legacy at Pleasant Grove
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	13,352
Land	2,005
Buildings	18,109
Cost Capitalized Subsequent to Acquisition	57
Land	2,033
Building & Improvements	18,138
Total	20,171
Accumulated Depreciation	3,237
Multifamily | Parc at Denham Springs Phase II
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	15,962
Land	1,505
Buildings	16,975
Cost Capitalized Subsequent to Acquisition	0
Land	1,505
Building & Improvements	16,975
Total	18,480
Accumulated Depreciation	873
Multifamily | Sugar Mill Phase III
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,216
Land	576
Buildings	9,755
Cost Capitalized Subsequent to Acquisition	(15)
Land	576
Building & Improvements	9,740
Total	10,316
Accumulated Depreciation	382
Multifamily | Toulon
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	13,697
Land	1,621
Buildings	20,107
Cost Capitalized Subsequent to Acquisition	411
Land	1,993
Building & Improvements	20,146
Total	22,139
Accumulated Depreciation	5,279
Multifamily | Villas at Bon Secour
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	19,492
Land	2,715
Buildings	15,385
Cost Capitalized Subsequent to Acquisition	52
Land	2,715
Building & Improvements	15,437
Total	18,152
Accumulated Depreciation	1,318
Multifamily | Vista Ridge
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,830
Land	1,339
Buildings	13,398
Cost Capitalized Subsequent to Acquisition	6
Land	1,339
Building & Improvements	13,404
Total	14,743
Accumulated Depreciation	2,590
Commercial
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	125,912
Land	27,783
Buildings	91,703
Cost Capitalized Subsequent to Acquisition	21,349
Land	27,783
Building & Improvements	113,052
Total	140,835
Accumulated Depreciation	46,526
Commercial | 770 South Post Oak
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	11,635
Land	1,763
Buildings	16,312
Cost Capitalized Subsequent to Acquisition	672
Land	1,763
Building & Improvements	16,984
Total	18,747
Accumulated Depreciation	3,037
Commercial | Browning Place
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	75,298
Land	5,096
Buildings	49,441
Cost Capitalized Subsequent to Acquisition	14,453
Land	5,096
Building & Improvements	63,894
Total	68,990
Accumulated Depreciation	28,140
Commercial | Stanford Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	38,979
Land	20,278
Buildings	25,876
Cost Capitalized Subsequent to Acquisition	6,224
Land	20,278
Building & Improvements	32,100
Total	52,378
Accumulated Depreciation	15,275
Commercial | Other
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land	646
Buildings	74
Cost Capitalized Subsequent to Acquisition	0
Land	646
Building & Improvements	74
Total	720
Accumulated Depreciation	74
Developed and Undeveloped Land
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	14,880
Land	66,215
Buildings	0
Cost Capitalized Subsequent to Acquisition	9,763
Land	75,978
Building & Improvements	0
Total	75,978
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
Land	2,999
Buildings	0
Cost Capitalized Subsequent to Acquisition	0
Land	2,999
Building & Improvements	0
Total	2,999
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	8,389
Land	43,608
Buildings	0
Cost Capitalized Subsequent to Acquisition	2,159
Land	45,767
Building & Improvements	0
Total	45,767
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	6,491
Land	19,608
Buildings	0
Cost Capitalized Subsequent to Acquisition	7,604
Land	27,212
Building & Improvements	0
Total	27,212
Accumulated Depreciation	$ 0