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REAL ESTATE INVESTMENTS AND MINIMUM FUTURE RENTALS - Purchase Price Allocation (Details) | 12 Months Ended | 24 Months Ended
--- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2018 USD ($) property
Allocation of purchase price |  |  |  |
Land | $ 11,318,000 | $ 3,531,000 |  | $ 11,318,000
Building | 65,029,000 | 35,297,000 |  | 65,029,000
Building Improvements | 2,015,000 | 858,000 |  | 2,015,000
Intangible Lease Asset | 4,435,000 | 4,009,000 |  | 4,435,000
Intangible Lease Liability | (2,507,000) | (158,000) |  | (2,507,000)
Total | $ 80,290,000 | $ 43,537,000 |  | 80,290,000
Weighted average amortization period for intangible lease assets | 6 years 9 months 18 days | 6 years 9 months 18 days |  |
Weighted average amortization period for intangible lease liabilities | 11 years 4 months 24 days | 12 years 2 months 12 days |  |
Above market lease accumulated amortization | $ 16,503,000 | $ 17,542,000 |  | 16,503,000
Below market lease accumulated amortization | 7,378,000 | 7,849,000 |  | $ 7,378,000
Net rental income due to amortization of the above/below market leases | 1,849,000 | 897,000 | $ 712,000 |
Amortization expense relating to origination costs | 7,175,000 | 4,984,000 | $ 3,612,000 |
Write-offs of properties | 2,743,000 | 884,000 |  |
Number of properties at which tenant filed bankruptcy | property |  |  |  | 4
Campania International/U.S. Tape industrial facility, Pennsburg, Pennsylvania |  |  |  |
Allocation of purchase price |  |  |  |
Land | 1,776,000 |  |  | $ 1,776,000
Building | 10,398,000 |  |  | 10,398,000
Building Improvements | 727,000 |  |  | 727,000
Total | 12,901,000 |  |  | 12,901,000
Plymouth Industries industrial facility, Plymouth, Minnesota |  |  |  |
Allocation of purchase price |  |  |  |
Land | 1,121,000 |  |  | 1,121,000
Building | 4,306,000 |  |  | 4,306,000
Building Improvements | 123,000 |  |  | 123,000
Total | 5,550,000 |  |  | 5,550,000
Applied Control Industrial Facility, Eaglewood, Colorado |  |  |  |
Allocation of purchase price |  |  |  |
Land | 1,562,000 |  |  | 1,562,000
Building | 11,027,000 |  |  | 11,027,000
Building Improvements | 273,000 |  |  | 273,000
Total | 12,862,000 |  |  | 12,862,000
Xerimis industrial facility, Moorestown, New Jersey |  |  |  |
Allocation of purchase price |  |  |  |
Land | 1,822,000 |  |  | 1,822,000
Building | 4,899,000 |  |  | 4,899,000
Building Improvements | 157,000 |  |  | 157,000
Intangible Lease Asset | 707,000 |  |  | 707,000
Intangible Lease Liability | (88,000) |  |  | (88,000)
Total | 7,497,000 |  |  | 7,497,000
Multi-tenant industrial facility, Moorestown, New Jersey |  |  |  |
Allocation of purchase price |  |  |  |
Land | 1,443,000 |  |  | 1,443,000
Building | 10,670,000 |  |  | 10,670,000
Building Improvements | 228,000 |  |  | 228,000
Intangible Lease Asset | 1,469,000 |  |  | 1,469,000
Intangible Lease Liability | (202,000) |  |  | (202,000)
Total | 13,608,000 |  |  | 13,608,000
Men's Warehouse industrial facility, Bakersfield, California |  |  |  |
Allocation of purchase price |  |  |  |
Land | 1,988,000 |  |  | 1,988,000
Building | 9,696,000 |  |  | 9,696,000
Building Improvements | 300,000 |  |  | 300,000
Intangible Lease Asset | 1,127,000 |  |  | 1,127,000
Intangible Lease Liability | (2,198,000) |  |  | (2,198,000)
Total | 10,913,000 |  |  | 10,913,000
Dufresne Spencer Group industrial facility, Green Park, Missouri |  |  |  |
Allocation of purchase price |  |  |  |
Land | 1,420,000 |  |  | 1,420,000
Building | 7,696,000 |  |  | 7,696,000
Building Improvements | 137,000 |  |  | 137,000
Intangible Lease Asset | 810,000 |  |  | 810,000
Total | 10,063,000 |  |  | 10,063,000
Transcendia industrial facility, Greenville, South Carolina |  |  |  |
Allocation of purchase price |  |  |  |
Land | 186,000 |  |  | 186,000
Building | 6,337,000 |  |  | 6,337,000
Building Improvements | 70,000 |  |  | 70,000
Intangible Lease Asset | 322,000 |  |  | 322,000
Intangible Lease Liability | (19,000) |  |  | (19,000)
Total | $ 6,896,000 |  |  | $ 6,896,000
Forbo industrial facility, Huntersville, North Carolina |  |  |  |
Allocation of purchase price |  |  |  |
Land |  | 1,046,000 |  |
Building |  | 6,452,000 |  |
Building Improvements |  | 222,000 |  |
Intangible Lease Asset |  | 1,052,000 |  |
Total |  | 8,772,000 |  |
Saddle Creek Logistics industrial facility, Pittston, Pennsylvania |  |  |  |
Allocation of purchase price |  |  |  |
Land |  | 999,000 |  |
Building |  | 9,675,000 |  |
Building Improvements |  | 247,000 |  |
Intangible Lease Asset |  | 1,028,000 |  |
Total |  | 11,949,000 |  |
Corporate Woods industrial facility, Ankeny, Iowa |  |  |  |
Allocation of purchase price |  |  |  |
Land |  | 1,351,000 |  |
Building |  | 11,420,000 |  |
Building Improvements |  | 187,000 |  |
Intangible Lease Asset |  | 1,929,000 |  |
Intangible Lease Liability |  | (158,000) |  |
Total |  | 14,729,000 |  |
Dufresne Spencer Group industrial facility, Memphis, Tennessee |  |  |  |
Allocation of purchase price |  |  |  |
Land |  | 135,000 |  |
Building |  | 7,750,000 |  |
Building Improvements |  | 202,000 |  |
Total |  | $ 8,087,000 |  |

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