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SUMMARY OF SIGNIFICANT ACOUNTING POLICIES (Details) |  | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 31, 2020 $ / shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) $ / shares | Dec. 31, 2019 USD ($) Segments $ / shares shares | Dec. 31, 2018 USD ($) Segments $ / shares shares | Mar. 27, 2020 shares | Feb. 01, 2020 $ / shares | Jan. 14, 2019 $ / shares | Jan. 19, 2018 $ / shares | Jan. 18, 2018 $ / shares
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Rental income from tenant reimbursements | $ |  |  |  | $ 4,857,794 | $ 3,258,579 |  |  |  |  |
Advertising expense | $ |  | $ 0 |  | $ 0 | $ 0 |  |  |  |  |
Potentially dilutive securities outstanding (in shares) | shares |  |  |  |  | 0 |  |  |  |  |
Dividends (in usd per share) |  |  |  | $ 0.7035 | $ 0.7035 |  |  |  |  |
Restricted cash | $ |  | $ 113,362 | $ 3,503,242 | $ 113,362 | $ 3,503,242 |  |  |  |  |
Tenant reimbursements | $ |  |  |  | $ 98,329 | $ 3,535,163 |  |  |  |  |
Percentage of share in property owned |  |  |  | 72.70% | 72.70% |  |  |  |  |
Share price (in usd per share) |  |  |  |  |  |  |  |  |  | $ 10
Stock repurchase program, shares authorized (in shares) | shares |  | 2,376,509 |  | 2,376,509 |  |  |  |  |  |
Impairment charges for real estate investments | $ |  |  |  | $ 0 | $ 0 |  |  |  |  |
Number of reportable segments | Segments |  |  |  | 1 | 1 |  |  |  |  |
Class M OP Units |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Conversion ratio |  |  |  | 0.2 |  |  |  |  |  |
Class P OP Units |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Other ownership interests, units issued (in shares) | shares |  | 56,029 |  | 56,029 |  |  |  |  |  |
Conversion ratio |  |  |  | 0.2 |  |  |  |  |  |
Common Class C |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Earnings (loss) per share (in usd per share) |  |  |  | $ (0.29) | $ (0.16) |  |  |  |  |
Dividends (in usd per share) |  |  |  | $ 0.7035 | 0.7035 |  |  |  |  |
Share price (in usd per share) |  |  |  |  |  |  |  |  |  | $ 10.00
Conversion ratio |  |  |  | 1 |  |  |  |  |  |
Common Class S |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Earnings (loss) per share (in usd per share) |  |  |  | $ (0.27) | $ (0.32) |  |  |  |  |
Dividends (in usd per share) |  |  | $ 0.7035 | $ 0.7035 |  |  |  |  |  |
Net asset value (in usd per share) |  |  |  |  |  |  |  | $ 10.16 | $ 10.05 |
Less Than One Year | Common Class S |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Stock redemption price (as a percent) |  |  |  |  |  |  |  |  | 97.00% |
Less Than Two Year | Common Class S |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Stock redemption price (as a percent) |  |  |  |  |  |  |  |  | 98.00% |
Later than Two Year but Less than Three Year |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Stock redemption price (as a percent) |  |  |  |  |  |  |  |  | 99.00% |
Later than Three years |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Stock redemption price (as a percent) |  |  |  |  |  |  |  |  | 100.00% |
Minimum |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Intangible assets, estimated useful lives |  |  |  | 3 years |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Intangible assets, estimated useful lives |  |  |  | 5 years |  |  |  |  |  |
Shares authorized to be repurchased per month (as a percent) |  |  |  | 2.00% |  |  |  |  |  |
Shares authorized to be repurchased per quarter (as a percent) |  |  |  | 5.00% |  |  |  |  |  |
Shares authorized to be repurchased per year (as a percent) |  |  |  | 20.00% |  |  |  |  |  |
Building | Minimum |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  | 10 years |  |  |  |  |  |
Building | Maximum |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  | 48 years |  |  |  |  |  |
Site Improvement | Maximum |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  | 15 years |  |  |  |  |  |
Tenant Improvement |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  | 15 years |  |  |  |  |  |
Tenant Improvement | Maximum |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  | 15 years |  |  |  |  |  |
Impounded Property Tax |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Restricted cash to fund property tax | $ |  | $ 20,678 | $ 16,315 | $ 20,678 | $ 16,315 |  |  |  |  |
Subsequent Event | Common Class C |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Stock repurchase program, shares authorized (in shares) | shares |  |  |  |  |  | 1,737,191 |  |  |  |
Subsequent Event | Common Class S |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Net asset value (in usd per share) | $ 10.16 |  |  |  |  |  | $ 10.27 |  |  |
Stock repurchase program, shares authorized (in shares) | shares |  |  |  |  |  | 3,309 |  |  |  |
Subsequent Event | Maximum |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Gross offering proceeds, percentage | 3.00% |  |  |  |  |  |  |  |  |
Lease Agreements |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Restricted cash | $ |  | $ 92,684 | $ 3,486,927 | $ 92,684 | $ 3,486,927 |  |  |  |  |
BrixInvest | Class M OP Units |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Other ownership interests, units issued (in shares) | shares |  | 657,949.5 |  | 657,949.5 |  |  |  |  |  |
BrixInvest | Class P OP Units |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Other ownership interests, units issued (in shares) | shares |  | 26,318 |  | 26,318 |  |  |  |  |  |
Sponsor | Reimbursable organizational and offering expenses |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Gross offering proceeds, percentage |  |  |  | 3.00% | 3.00% |  |  |  |  |

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