SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	$ 250,700
Initial Cost
Land	175,715
Building and Improvements	641,436
Net Improvements (Write-Offs) Since Acquisition	51,727
Gross Amount at Which Carried
Land	175,715
Building and Improvements	693,163
Investments in real estate	868,878	$ 660,413
Accumulated Depreciation	164,116	$ 158,407	$ 144,718
Other disclosures
Outstanding balance	475,401
Federal tax cost basis (unaudited)	956,900
Line of Credit
Other disclosures
Outstanding balance	153,200
Office Building | 3601 S Congress Avenue Austin, TX
Initial Cost
Land	9,569
Building and Improvements	18,593
Net Improvements (Write-Offs) Since Acquisition	14,976
Gross Amount at Which Carried
Land	9,569
Building and Improvements	33,569
Investments in real estate	43,138
Accumulated Depreciation	10,468
Office Building | 1 Kaiser Plaza Oakland, CA
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	97,100
Initial Cost
Land	9,261
Building and Improvements	113,619
Net Improvements (Write-Offs) Since Acquisition	14,353
Gross Amount at Which Carried
Land	9,261
Building and Improvements	127,972
Investments in real estate	137,233
Accumulated Depreciation	54,338
Office Building | 2 Kaiser Plaza Parking Lot Oakland, CA
Initial Cost
Land	10,931
Building and Improvements	110
Net Improvements (Write-Offs) Since Acquisition	3,624
Gross Amount at Which Carried
Land	10,931
Building and Improvements	3,734
Investments in real estate	14,665
Accumulated Depreciation	0
Office Building | 11600 Wilshire Blvd Los Angeles, CA
Initial Cost
Land	3,477
Building and Improvements	18,522
Net Improvements (Write-Offs) Since Acquisition	2,780
Gross Amount at Which Carried
Land	3,477
Building and Improvements	21,302
Investments in real estate	24,779
Accumulated Depreciation	7,902
Office Building | 11620 Wilshire Blvd Los Angeles, CA
Initial Cost
Land	7,672
Building and Improvements	51,999
Net Improvements (Write-Offs) Since Acquisition	8,214
Gross Amount at Which Carried
Land	7,672
Building and Improvements	60,213
Investments in real estate	67,885
Accumulated Depreciation	21,902
Office Building | 4750 Wilshire Blvd Los Angeles, CA
Initial Cost
Land	4,000
Building and Improvements	0
Net Improvements (Write-Offs) Since Acquisition	172
Gross Amount at Which Carried
Land	4,000
Building and Improvements	172
Investments in real estate	4,172
Accumulated Depreciation	0
Office Building | Lindblade Media Center Los Angeles, CA
Initial Cost
Land	6,341
Building and Improvements	11,568
Net Improvements (Write-Offs) Since Acquisition	721
Gross Amount at Which Carried
Land	6,341
Building and Improvements	12,289
Investments in real estate	18,630
Accumulated Depreciation	3,136
Office Building | 1037 N Sycamore Los Angeles, CA
Initial Cost
Land	1,839
Building and Improvements	1,094
Net Improvements (Write-Offs) Since Acquisition	130
Gross Amount at Which Carried
Land	1,839
Building and Improvements	1,224
Investments in real estate	3,063
Accumulated Depreciation	81
Office Building | 1130 Howard Street San Francisco, CA
Initial Cost
Land	8,290
Building and Improvements	10,480
Net Improvements (Write-Offs) Since Acquisition	(49)
Gross Amount at Which Carried
Land	8,290
Building and Improvements	10,431
Investments in real estate	18,721
Accumulated Depreciation	1,706
Office Building | 9460 Wilshire Boulevard Los Angeles, CA
Initial Cost
Land	52,199
Building and Improvements	76,730
Net Improvements (Write-Offs) Since Acquisition	3,038
Gross Amount at Which Carried
Land	52,199
Building and Improvements	79,768
Investments in real estate	131,967
Accumulated Depreciation	12,677
Office Building | 1021 East 7th Street, Austin, TX
Initial Cost
Land	4,979
Building and Improvements	733
Net Improvements (Write-Offs) Since Acquisition	(188)
Gross Amount at Which Carried
Land	4,979
Building and Improvements	545
Investments in real estate	5,524
Accumulated Depreciation	112
Office Building | 3101 S Western Avenue Los Angeles, CA
Initial Cost
Land	2,279
Building and Improvements	0
Net Improvements (Write-Offs) Since Acquisition	1,091
Gross Amount at Which Carried
Land	2,279
Building and Improvements	1,091
Investments in real estate	3,370
Accumulated Depreciation	0
Office Building | 3022 S Western Avenue Los Angeles, CA
Initial Cost
Land	5,638
Building and Improvements	156
Net Improvements (Write-Offs) Since Acquisition	716
Gross Amount at Which Carried
Land	5,638
Building and Improvements	872
Investments in real estate	6,510
Accumulated Depreciation	12
Office Building | 1007 E 7th Street Austin, TX
Initial Cost
Land	1,866
Building and Improvements	6
Net Improvements (Write-Offs) Since Acquisition	264
Gross Amount at Which Carried
Land	1,866
Building and Improvements	270
Investments in real estate	2,136
Accumulated Depreciation	0
Office Building | 3109 S Western Avenue Los Angeles, CA
Initial Cost
Land	712
Building and Improvements	2
Net Improvements (Write-Offs) Since Acquisition	117
Gross Amount at Which Carried
Land	712
Building and Improvements	119
Investments in real estate	831
Accumulated Depreciation	0
Office Building | Channel House Oakland, CA
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	87,000
Initial Cost
Land	17,214
Building and Improvements	103,553
Net Improvements (Write-Offs) Since Acquisition	214
Gross Amount at Which Carried
Land	17,214
Building and Improvements	103,767
Investments in real estate	120,981
Accumulated Depreciation	2,934
Office Building | 1150 Clay Oakland, CA
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	66,600
Initial Cost
Land	16,643
Building and Improvements	115,828
Net Improvements (Write-Offs) Since Acquisition	288
Gross Amount at Which Carried
Land	16,643
Building and Improvements	116,116
Investments in real estate	132,759
Accumulated Depreciation	2,968
Office Building | F3 Land Site, Oakland, CA
Initial Cost
Land	251
Building and Improvements	0
Net Improvements (Write-Offs) Since Acquisition	31
Gross Amount at Which Carried
Land	251
Building and Improvements	31
Investments in real estate	282
Accumulated Depreciation	0
Office Building | 466 Water Street Land Site, Oakland, CA
Initial Cost
Land	2,505
Building and Improvements	0
Net Improvements (Write-Offs) Since Acquisition	95
Gross Amount at Which Carried
Land	2,505
Building and Improvements	95
Investments in real estate	2,600
Accumulated Depreciation	0
Hotel | Sheraton Grand Hotel Sacramento, CA
Initial Cost
Land	3,498
Building and Improvements	107,447
Net Improvements (Write-Offs) Since Acquisition	818
Gross Amount at Which Carried
Land	3,498
Building and Improvements	108,265
Investments in real estate	111,763
Accumulated Depreciation	41,538
Hotel | Sheraton Grand Hotel Parking & Retail Sacramento, CA
Initial Cost
Land	6,551
Building and Improvements	10,996
Net Improvements (Write-Offs) Since Acquisition	322
Gross Amount at Which Carried
Land	6,551
Building and Improvements	11,318
Investments in real estate	17,869
Accumulated Depreciation	$ 4,342