SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 275,955
Land	135,169
Buildings & Improvements	348,884
Capitalized Cost Subsequent to Acquisition	8,809
Land, Buildings & Improvements Total	492,862
Accumulated Depreciation and Amortization	(83,169)	$ (65,769)	$ (53,604)
Reconciliation of real estate owned:
Beginning balance	490,526	360,417	358,982
Acquisitions	0	128,639	0
Additions	2,336	1,470	1,435
Ending balance	492,862	490,526	360,417
Reconciliation of accumulated depreciation:
Beginning balance	65,769	53,604	41,839
Depreciation and amortization expense	17,400	12,165	11,765
Ending balance	83,169	65,769	$ 53,604
Aggregate cost of real estate for federal income tax purposes	583,106
Gross intangible lease assets	66,987
Below market lease, gross	18,565
Mortgage loans payable, net	190,433	191,001
9022 Heritage Parkway, Woodridge, IL, Office
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	6,603
Land	2,311
Buildings & Improvements	10,989
Capitalized Cost Subsequent to Acquisition	0
Land, Buildings & Improvements Total	13,300
Accumulated Depreciation and Amortization	(6,012)
Reconciliation of accumulated depreciation:
Ending balance	$ 6,012
9022 Heritage Parkway, Woodridge, IL, Office | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
9022 Heritage Parkway, Woodridge, IL, Office | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
Wallingford Plaza, Seattle, WA, Mixed-Use (Office over Retail)
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 6,733
Land	3,713
Buildings & Improvements	9,015
Capitalized Cost Subsequent to Acquisition	282
Land, Buildings & Improvements Total	13,010
Accumulated Depreciation and Amortization	(2,863)
Reconciliation of accumulated depreciation:
Ending balance	$ 2,863
Wallingford Plaza, Seattle, WA, Mixed-Use (Office over Retail) | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
Wallingford Plaza, Seattle, WA, Mixed-Use (Office over Retail) | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
Commerce Corner, Logan Township, NJ, Industrial
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 11,933
Land	3,397
Buildings & Improvements	16,353
Capitalized Cost Subsequent to Acquisition	1,772
Land, Buildings & Improvements Total	21,522
Accumulated Depreciation and Amortization	(5,191)
Reconciliation of accumulated depreciation:
Ending balance	$ 5,191
Commerce Corner, Logan Township, NJ, Industrial | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
Commerce Corner, Logan Township, NJ, Industrial | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
Anaheim Hills Office Plaza, Anaheim, CA, Office
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 9,919
Land	6,520
Buildings & Improvements	11,980
Capitalized Cost Subsequent to Acquisition	3,577
Land, Buildings & Improvements Total	22,077
Accumulated Depreciation and Amortization	(7,187)
Reconciliation of accumulated depreciation:
Ending balance	$ 7,187
Anaheim Hills Office Plaza, Anaheim, CA, Office | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
Anaheim Hills Office Plaza, Anaheim, CA, Office | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
Shops at Terra Nova Plaza, Chula Vista, CA, Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 12,368
Land	10,628
Buildings & Improvements	11,222
Capitalized Cost Subsequent to Acquisition	0
Land, Buildings & Improvements Total	21,850
Accumulated Depreciation and Amortization	(2,815)
Reconciliation of accumulated depreciation:
Ending balance	$ 2,815
Shops at Terra Nova Plaza, Chula Vista, CA, Retail | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
Shops at Terra Nova Plaza, Chula Vista, CA, Retail | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
The Flats at Carrs Hill, Athens, GA, University of GA Student Housing
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 14,500
Land	3,144
Buildings & Improvements	23,856
Capitalized Cost Subsequent to Acquisition	1,066
Land, Buildings & Improvements Total	28,066
Accumulated Depreciation and Amortization	(9,378)
Reconciliation of accumulated depreciation:
Ending balance	$ 9,378
The Flats at Carrs Hill, Athens, GA, University of GA Student Housing | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
The Flats at Carrs Hill, Athens, GA, University of GA Student Housing | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	27 years 6 months
Loudoun Gateway I, Sterling, VA, Office
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 10,775
Land	2,042
Buildings & Improvements	19,908
Capitalized Cost Subsequent to Acquisition	0
Land, Buildings & Improvements Total	21,950
Accumulated Depreciation and Amortization	(12,587)
Reconciliation of accumulated depreciation:
Ending balance	$ 12,587
Loudoun Gateway I, Sterling, VA, Office | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
Loudoun Gateway I, Sterling, VA, Office | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
40 Allied Drive, Dedham, MA, Medical Office
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 21,822
Land	5,484
Buildings & Improvements	28,516
Capitalized Cost Subsequent to Acquisition	101
Land, Buildings & Improvements Total	34,101
Accumulated Depreciation and Amortization	(7,703)
Reconciliation of accumulated depreciation:
Ending balance	$ 7,703
40 Allied Drive, Dedham, MA, Medical Office | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
40 Allied Drive, Dedham, MA, Medical Office | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
Palmetto Lakes, Miami Lakes, FL, Industrial
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 14,649
Land	6,054
Buildings & Improvements	7,006
Capitalized Cost Subsequent to Acquisition	543
Land, Buildings & Improvements Total	13,603
Accumulated Depreciation and Amortization	(3,639)
Reconciliation of accumulated depreciation:
Ending balance	$ 3,639
Palmetto Lakes, Miami Lakes, FL, Industrial | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
Palmetto Lakes, Miami Lakes, FL, Industrial | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
Hialeah I, Miami, FL, Industrial
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 4,671
Land	1,642
Buildings & Improvements	2,749
Capitalized Cost Subsequent to Acquisition	150
Land, Buildings & Improvements Total	4,541
Accumulated Depreciation and Amortization	(1,006)
Reconciliation of accumulated depreciation:
Ending balance	$ 1,006
Hialeah I, Miami, FL, Industrial | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
Hialeah I, Miami, FL, Industrial | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
Hialeah II, Miami, FL, Industrial
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 3,993
Land	1,725
Buildings & Improvements	1,666
Capitalized Cost Subsequent to Acquisition	633
Land, Buildings & Improvements Total	4,024
Accumulated Depreciation and Amortization	(907)
Reconciliation of accumulated depreciation:
Ending balance	$ 907
Hialeah II, Miami, FL, Industrial | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
Hialeah II, Miami, FL, Industrial | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
Elston Plaza, Chicago, IL, Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 17,149
Land	17,767
Buildings & Improvements	11,028
Capitalized Cost Subsequent to Acquisition	27
Land, Buildings & Improvements Total	28,822
Accumulated Depreciation and Amortization	(2,945)
Reconciliation of accumulated depreciation:
Ending balance	$ 2,945
Elston Plaza, Chicago, IL, Retail | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
Elston Plaza, Chicago, IL, Retail | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
Providence Square, Marietta, GA, Retail
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 29,700
Land	9,742
Buildings & Improvements	45,319
Capitalized Cost Subsequent to Acquisition	357
Land, Buildings & Improvements Total	55,417
Accumulated Depreciation and Amortization	(8,337)
Reconciliation of accumulated depreciation:
Ending balance	$ 8,337
Providence Square, Marietta, GA, Retail | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
Providence Square, Marietta, GA, Retail | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
Seattle East Industrial, Redmond, WA, Industrial
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 45,140
Land	50,691
Buildings & Improvements	30,947
Capitalized Cost Subsequent to Acquisition	0
Land, Buildings & Improvements Total	81,639
Accumulated Depreciation and Amortization	(3,752)
Reconciliation of accumulated depreciation:
Ending balance	$ 3,752
Seattle East Industrial, Redmond, WA, Industrial | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
Seattle East Industrial, Redmond, WA, Industrial | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	40 years
The Glenn, Centennial, CO, Residential
Real Estate and Accumulated Depreciation [Line Items]
Encumbrance	$ 66,000
Land	10,309
Buildings & Improvements	118,330
Capitalized Cost Subsequent to Acquisition	301
Land, Buildings & Improvements Total	128,940
Accumulated Depreciation and Amortization	(8,847)
Reconciliation of accumulated depreciation:
Ending balance	$ 8,847
The Glenn, Centennial, CO, Residential | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	5 years
The Glenn, Centennial, CO, Residential | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Depreciable Lives	27 years 6 months
Wells Fargo Bank | Revised Wells Fargo Line of Credit
Reconciliation of accumulated depreciation:
Wells Fargo	$ 84,800	82,300
Mortgage Loans Payable
Reconciliation of accumulated depreciation:
Mortgage loans payable, net	190,433	$ 191,001
Mortgage Loans Payable | Talcott Resolution Life Insurance Company | Commerce Corner, Logan Township, NJ, Industrial
Reconciliation of accumulated depreciation:
Mortgage loans payable, net	11,933
Mortgage Loans Payable | Nationwide Bank | The Flats at Carrs Hill, Athens, GA, University of GA Student Housing
Reconciliation of accumulated depreciation:
Mortgage loans payable, net	14,500
Secured Debt | Transamerica Loan | Wallingford Plaza, Seattle, WA, Mixed-Use (Office over Retail)
Reconciliation of accumulated depreciation:
Mortgage loans payable, net	6,733
Secured Debt | State Farm Loan | Elston Plaza, Chicago, IL, Retail
Reconciliation of accumulated depreciation:
Mortgage loans payable, net	17,149
Secured Debt | Nationwide Life Insurance Company | Providence Square, Marietta, GA, Retail
Reconciliation of accumulated depreciation:
Mortgage loans payable, net	29,700
Secured Debt | JPMorgan Chase Loan | Seattle East Industrial, Redmond, WA, Industrial
Reconciliation of accumulated depreciation:
Mortgage loans payable, net	45,140
Secured Debt | Massachusetts Mutual Life Insurance Company | The Glenn, Centennial, CO, Residential
Reconciliation of accumulated depreciation:
Mortgage loans payable, net	$ 66,000