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REAL ESTATE INVESTMENTS - Purchase Price Allocation (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) item | Dec. 31, 2020 USD ($) item | Dec. 31, 2019 USD ($)
REAL ESTATE ACQUISITION |  |  |
Weighted average amortization period for intangible lease assets | 4 years 1 month 6 days | 8 years 3 months 18 days |
Weighted average amortization period for intangible lease liabilities | 8 years 2 months 12 days | 13 years 8 months 12 days |
Above market lease accumulated amortization | $ 25,892,000 | $ 24,530,000 |
Below market lease accumulated amortization | 8,968,000 | 8,539,000 |
Amortization of intangibles relating to leases, net | 785,000 | 780,000 | $ 914,000
Amortization expense relating to origination costs | 4,700,000 | 4,617,000 | 4,039,000
Rental income, net |  |  |
REAL ESTATE ACQUISITION |  |  |
Intangible Lease Liability | (10,407,000) |  |
Amortization of intangibles relating to leases, net | 785,000 | 780,000 | $ 914,000
Real Estate Acquisitions in 2021 |  |  |
REAL ESTATE ACQUISITION |  |  |
Intangible Lease Asset | 2,288,000 |  |
Intangible Lease Liability | (632,000) |  |
Total | 24,534,000 |  |
Real Estate Acquisitions in 2021 | Land |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property | 3,832,000 |  |
Real Estate Acquisitions in 2021 | Building & Improvements |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property | 19,046,000 |  |
Real Estate Acquisitions in 2021 | Pureon, Inc. industrial facility, Monroe, North Carolina |  |  |
REAL ESTATE ACQUISITION |  |  |
Intangible Lease Asset | 1,057,000 |  |
Total | $ 7,060,000 |  |
Discount Rate | item | 0.0608 |  |
Real Estate Acquisitions in 2021 | Pureon, Inc. industrial facility, Monroe, North Carolina | Level 3 |  |  |
REAL ESTATE ACQUISITION |  |  |
Market Cap Rate | item | 0.0700 |  |
Real Estate Acquisitions in 2021 | Pureon, Inc. industrial facility, Monroe, North Carolina | Land |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property | $ 897,000 |  |
Real Estate Acquisitions in 2021 | Pureon, Inc. industrial facility, Monroe, North Carolina | Building & Improvements |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property | 5,106,000 |  |
Real Estate Acquisitions in 2021 | Multi-tenant industrial facility, Lehigh Acres, Florida |  |  |
REAL ESTATE ACQUISITION |  |  |
Intangible Lease Asset | 701,000 |  |
Intangible Lease Liability | (596,000) |  |
Total | $ 9,433,000 |  |
Discount Rate | item | 0.0560 |  |
Real Estate Acquisitions in 2021 | Multi-tenant industrial facility, Lehigh Acres, Florida | Level 3 |  |  |
REAL ESTATE ACQUISITION |  |  |
Market Cap Rate | item | 0.0675 |  |
Real Estate Acquisitions in 2021 | Multi-tenant industrial facility, Lehigh Acres, Florida | Land |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property | $ 1,935,000 |  |
Real Estate Acquisitions in 2021 | Multi-tenant industrial facility, Lehigh Acres, Florida | Building & Improvements |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property | 7,393,000 |  |
Real Estate Acquisitions in 2021 | Home Depot USA, Inc, industrial facility, Omaha, Nebraska |  |  |
REAL ESTATE ACQUISITION |  |  |
Intangible Lease Asset | 530,000 |  |
Intangible Lease Liability | (36,000) |  |
Total | $ 8,041,000 |  |
Discount Rate | item | 0.0616 |  |
Real Estate Acquisitions in 2021 | Home Depot USA, Inc, industrial facility, Omaha, Nebraska | Level 3 |  |  |
REAL ESTATE ACQUISITION |  |  |
Market Cap Rate | item | 0.0625 |  |
Real Estate Acquisitions in 2021 | Home Depot USA, Inc, industrial facility, Omaha, Nebraska | Land |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property | $ 1,000,000 |  |
Real Estate Acquisitions in 2021 | Home Depot USA, Inc, industrial facility, Omaha, Nebraska | Building & Improvements |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property | $ 6,547,000 |  |
Real Estate Acquisitions in 2020 |  |  |
REAL ESTATE ACQUISITION |  |  |
Intangible Lease Asset |  | 3,905,000 |
Intangible Lease Liability |  | (568,000) |
Total |  | 28,504,000 |
Real Estate Acquisitions in 2020 | Land |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property |  | 2,078,000 |
Real Estate Acquisitions in 2020 | Building & Improvements |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property |  | 23,089,000 |
Real Estate Acquisitions in 2020 | Creative Office Environments industrial facility, Ashland, Virginia |  |  |
REAL ESTATE ACQUISITION |  |  |
Intangible Lease Asset |  | 927,000 |
Total |  | $ 9,219,000 |
Real Estate Acquisitions in 2020 | Creative Office Environments industrial facility, Ashland, Virginia | Level 3 |  |  |
REAL ESTATE ACQUISITION |  |  |
Market Cap Rate | item |  | 0.0650 |
Real Estate Acquisitions in 2020 | Creative Office Environments industrial facility, Ashland, Virginia | Land |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property |  | $ 391,000 |
Real Estate Acquisitions in 2020 | Creative Office Environments industrial facility, Ashland, Virginia | Building & Improvements |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property |  | 7,901,000 |
Real Estate Acquisitions in 2020 | Fed Ex industrial facility, Lowell, Arkansas |  |  |
REAL ESTATE ACQUISITION |  |  |
Intangible Lease Asset |  | 2,978,000 |
Intangible Lease Liability |  | (568,000) |
Total |  | $ 19,285,000 |
Discount Rate | item |  | 0.0616 |
Real Estate Acquisitions in 2020 | Fed Ex industrial facility, Lowell, Arkansas | Level 3 |  |  |
REAL ESTATE ACQUISITION |  |  |
Market Cap Rate | item |  | 0.0625 |
Real Estate Acquisitions in 2020 | Fed Ex industrial facility, Lowell, Arkansas | Land |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property |  | $ 1,687,000 |
Real Estate Acquisitions in 2020 | Fed Ex industrial facility, Lowell, Arkansas | Building & Improvements |  |  |
REAL ESTATE ACQUISITION |  |  |
Acquired property |  | $ 15,188,000 |

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