Investment in Real Estate - Schedule of Interest in Real Properties (Detail)	6 Months Ended
Jun. 30, 2024 USD ($) ft² a Property
Real Estate Properties [Line Items]
Number of Properties \| Property	19
Walgreens Grand Rapids ("GR Property") [Member] \| Grand Rapids, MI [Member]
Real Estate Properties [Line Items]
Ownership Percentage	100.00%
Number of Properties \| Property	1
Square Feet \| ft²	14,552
Remaining Lease Term	13 years 1 month 6 days
Annualized Rental Income	$ 500,000
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2017-07
Purchase Price	$ 7,936,508
Daimler Trucks North America Office Building ("FM Property") [Member] \| Fort Mill, SC [Member]
Real Estate Properties [Line Items]
Ownership Percentage	100.00%
Number of Properties \| Property	1
Square Feet \| ft²	150,164
Remaining Lease Term	4 years 6 months
Annualized Rental Income	$ 2,670,638
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2018-02
Purchase Price	$ 40,000,000
Alliance Data Systems Office Building ("CO Property") [Member] \| Cleveland, OH [Member]
Real Estate Properties [Line Items]
Ownership Percentage	100.00%
Number of Properties \| Property	1
Square Feet \| ft²	241,493
Remaining Lease Term	8 years 2 months 12 days
Annualized Rental Income	$ 3,362,844
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2018-07
Purchase Price	$ 46,950,000
Hoya Optical Labs of America ("Lewisville Property") [Member] \| Lewisville, TX [Member]
Real Estate Properties [Line Items]
Ownership Percentage	100.00%
Number of Properties \| Property	1
Square Feet \| ft²	89,473
Remaining Lease Term	4 years
Annualized Rental Income	$ 937,060
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2018-11
Purchase Price	$ 14,120,000
Williams Sonoma Office Building ("SF Property") [Member] \| San Francisco, CA [Member]
Real Estate Properties [Line Items]
Ownership Percentage	75.00%
Number of Properties \| Property	1
Square Feet \| ft²	13,907
Remaining Lease Term	0 years
Annualized Rental Income	$ 0
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2019-09
Purchase Price	$ 11,600,000
Martin Brower Industrial Buildings ("Buchanan Property") [Member] \| Phoenix, AZ [Member]
Real Estate Properties [Line Items]
Ownership Percentage	100.00%
Number of Properties \| Property	1
Square Feet \| ft²	93,302
Remaining Lease Term	7 years 8 months 12 days
Annualized Rental Income	$ 1,083,444
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2019-11
Purchase Price	$ 17,300,000
Multifamily Residential Property [Member]
Real Estate Properties [Line Items]
Remaining Lease Term	1 year
Multifamily Residential Property [Member] \| Keller Property [Member] \| Carrolton, Texas [Member]
Real Estate Properties [Line Items]
Ownership Percentage	97.00%
Number of Properties \| Property	1
Square Feet \| ft²	255,627
Annualized Rental Income	$ 5,638,361
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2021-02
Purchase Price	$ 56,500,000
Multifamily Residential Property [Member] \| Summerfield Property [Member] \| Landover, MD [Member]
Real Estate Properties [Line Items]
Ownership Percentage	25.00%
Number of Properties \| Property	1
Square Feet \| ft²	452,876
Annualized Rental Income	$ 10,595,447
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2021-03
Purchase Price	$ 115,500,000
Multifamily Residential Property [Member] \| Kacey Property [Member] \| Kingwood, Texas [Member]
Real Estate Properties [Line Items]
Ownership Percentage	10.00%
Number of Properties \| Property	1
Square Feet \| ft²	296,991
Annualized Rental Income	$ 5,341,050
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2021-11
Purchase Price	$ 67,000,000
Multifamily Residential Property [Member] \| Industry Property [Member] \| Cleveland, OH [Member]
Real Estate Properties [Line Items]
Ownership Percentage	10.00%
Number of Properties \| Property	1
Square Feet \| ft²	187,678
Annualized Rental Income	$ 4,772,799
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2021-12
Purchase Price	$ 81,000,000
Multifamily Residential Property [Member] \| Longmire Property [Member] \| Conroe, TX [Member]
Real Estate Properties [Line Items]
Ownership Percentage	96.46%
Number of Properties \| Property	1
Square Feet \| ft²	231,720
Annualized Rental Income	$ 3,211,114
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2022-04
Purchase Price	$ 43,400,000
Multifamily Residential Property [Member] \| West End Property [Member] \| Lenexa, KS [Member]
Real Estate Properties [Line Items]
Ownership Percentage	10.00%
Number of Properties \| Property	1
Square Feet \| ft²	299,813
Annualized Rental Income	$ 5,166,260
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2022-08
Purchase Price	$ 69,375,000
Multifamily Residential Property [Member] \| Palms Property [Member] \| Houston, TX [Member]
Real Estate Properties [Line Items]
Ownership Percentage	10.00%
Number of Properties \| Property	1
Square Feet \| ft²	222,672
Annualized Rental Income	$ 4,010,775
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2022-08
Purchase Price	$ 48,000,000
Amazon Last Mile Cleveland [Member] \| Madison Ave Property [Member] \| Cleveland, OH [Member]
Real Estate Properties [Line Items]
Ownership Percentage	100.00%
Number of Properties \| Property	1
Square Feet \| ft²	168,750
Remaining Lease Term	6 years 9 months 18 days
Annualized Rental Income	$ 1,555,254
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2021-05
Purchase Price	$ 30,800,000
Valencia California [Member] \| Valencia Property [Member] \| Santa Clarita, CA [Member]
Real Estate Properties [Line Items]
Ownership Percentage	10.00%
Number of Properties \| Property	1
Square Feet \| ft²	180,415
Remaining Lease Term	11 years 6 months
Annualized Rental Income	$ 5,323,193
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2021-07
Purchase Price	$ 92,000,000
De Anza Plaza Office Buildings [Member] \| De Anza Property [Member] \| Cupertino, CA [Member]
Real Estate Properties [Line Items]
Ownership Percentage	100.00%
Number of Properties \| Property	1
Square Feet \| ft²	83,959
Remaining Lease Term	7 years 1 month 6 days
Annualized Rental Income	$ 4,206,056
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2021-07
Purchase Price	$ 63,750,000
Mars Petcare Dry/Cold Storage Facility [Member] \| Fisher Road Property [Member] \| Cleveland, OH [Member]
Real Estate Properties [Line Items]
Ownership Percentage	100.00%
Number of Properties \| Property	1
Square Feet \| ft²	465,256
Remaining Lease Term	2 years 10 months 24 days
Annualized Rental Income	$ 2,984,877
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2022-03
Purchase Price	$ 58,000,000
Office Tower \| ON3 Property [Member] \| Nutley, NJ [Member]
Real Estate Properties [Line Items]
Ownership Percentage	10.00%
Number of Properties \| Property	1
Square Feet \| ft²	332,818
Remaining Lease Term	14 years 6 months
Annualized Rental Income	$ 7,245,828
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2022-04
Purchase Price	$ 131,667,000
Mount Comfort Land [Member] \| Greenfield, IN [Member]
Real Estate Properties [Line Items]
Ownership Percentage	100.00%
Number of Properties \| Property	0
Square Feet \| a	1
Remaining Lease Term	11 years 9 months 18 days
Annualized Rental Income	$ 53,140
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2022-10
Purchase Price	$ 445,000
Pearland Property [Member] \| Pearland, TX [Member]
Real Estate Properties [Line Items]
Ownership Percentage	5.00%
Number of Properties \| Property	1
Square Feet \| ft²	219,624
Annualized Rental Income	$ 4,383,498
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Rental revenues
Acquisition Date	2023-06
Purchase Price	$ 40,500,000

Business acquisition, effective month and year.

No definition available.

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- Definition

Area of a real estate property.

+ References

No definition available.

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- Definition

Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-1

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

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- Definition

Indicates line item in statement of income or comprehensive income that includes operating lease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479016/842-30-45-3

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- Definition

Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479773/842-30-50-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 270
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482964/270-10-50-6A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479016/842-30-45-3

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Balance Type:	credit
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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479589/842-20-55-53

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (g)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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