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REAL ESTATE ASSETS (Properties) (Detail)	12 Months Ended
	Dec. 31, 2019 ft² Property State	Mar. 31, 2020 ft² Property	Oct. 31, 2017 Property
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Number of properties			1
Number of states that real estate property is located | State	7
North Dakota
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Number of properties	4
Industrial Properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Number of properties	1	1
Single Family
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Term of non-cancelable lease agreements	18 months
Term of option to extend lease agreements	6 months
Office Properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Number of properties	12	10
Industrial Office Properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Rentable square feet | ft²	1,192,566	998,016
Retail Properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Number of properties	4	4
Rentable square feet | ft²	131,722	131,722
Residential Properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Number of properties	136	138
Number of Limited Liability Companies	1	1

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Lessor leasing arrangements operating lease option to extend.

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Number of limited liability companies.

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Number Of States Real Estate Property Is Located

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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.

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- Definition

Area of a real estate property.

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- Definition

Term of lessor's 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/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919359-209981

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

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