MERGER AND SELF-MANAGEMENT TRANSACTION Additional Information (Details)			6 Months Ended	12 Months Ended
	Dec. 31, 2015 shares	Jun. 24, 2015 $ / shares shares	Dec. 31, 2015 shares	Dec. 31, 2019 USD ($) property shares	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Self-management transaction expense				$ 1,468,913	$ 0
Contingent consideration, conversion ratio				0.14
Class M OP Units
Business Acquisition [Line Items]
Conversion ratio				0.2
Class P OP Units
Business Acquisition [Line Items]
Other ownership interests, units issued (in shares) | shares				56,029
Stock compensation expense				$ 2,200,000
Conversion ratio				0.2
BrixInvest
Business Acquisition [Line Items]
Self-management transaction expense				$ 1,468,913
Fair value of consideration transferred				50,603,000
Intangible assets				7,700,000
2020				1,926,667
2021				1,926,667
2022				1,926,666
2023				960,000
2024				$ 960,000
BrixInvest | Class M OP Units
Business Acquisition [Line Items]
Other ownership interests, units issued (in shares) | shares				657,949.5
BrixInvest | Class P OP Units
Business Acquisition [Line Items]
Other ownership interests, units issued (in shares) | shares				26,318
Daisho OP Holdings, LLC | BrixInvest
Business Acquisition [Line Items]
Ownership interests distributed				100.00%
Operating Partnership | Class M OP Units and Class P OP Units
Business Acquisition [Line Items]
Noncontrolling interest (as a percent)				13.00%
REIT I
Business Acquisition [Line Items]
Number of real estate properties acquired | property				20
Number of real estate properties, subject to California law | property				17
Percentage of assets acquired by value, subject to California law				93.00%
Contingent consideration paid				$ 0
Acquisition-related transaction costs				$ 3,044,480
Common Class C
Business Acquisition [Line Items]
Conversion ratio				1
Common Class C | REIT I
Business Acquisition [Line Items]
Issuance of common stock in merger (in shares) | shares				8,042,221.6
Messrs. Halfacre and Pacini | Class P OP Units
Business Acquisition [Line Items]
Other ownership interests, units issued (in shares) | shares				29,711
Sponsor
Business Acquisition [Line Items]
Issuance of common stock in offering (in shares) | shares	10,000	10,000
Shares issued (in usd per share) | $ / shares		$ 10.00
Sponsor | Common Class C
Business Acquisition [Line Items]
Issuance of common stock in offering (in shares) | shares			20,000	10,740
Rich Uncles Real Estate Investment Trust I (“REIT I”)
Business Acquisition [Line Items]
Ownership (as a percent)					4.80%