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OTHER INCOME - Lease Assignment Fee Income and Insurance Recoveries on Hurricane Casualty (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 31, 2021 USD ($) | Mar. 31, 2021 USD ($) item | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Lease Assignment Fee Income |  |  |  |  |  |  |
Fee income, lease assignment agreement |  | $ 100,000 |  |  |  |  |
Number of properties included in a lease split and assignment agreement | item |  | 6 |  |  |  |  |
Insurance Recoveries on Hurricane Casualty |  |  |  |  |  |  |
Impairment due to casualty loss |  |  |  | $ 430,000 |  | $ 430,000 |
Casualty loss, insurance recovery proceeds received, classified as investing activities |  |  |  |  | $ 550,000 | $ 150,000 |
Other income |  |  |  |  |  |  |
Lease Assignment Fee Income |  |  |  |  |  |  |
Fee income, lease assignment agreement |  |  |  |  | 100,000 |  |
Real Estate in Lake Charles, LA |  |  |  |  |  |  |
Insurance Recoveries on Hurricane Casualty |  |  |  |  |  |  |
Impairment due to casualty loss |  |  |  |  |  |  | $ 430,000
Receivable for insurance recoveries |  |  |  |  |  |  | 430,000
Amount of insurance deductible |  |  |  |  |  |  | 250,000
Total claim amount submitted to insurance carrier |  |  | $ 2,200,000 |  | 2,200,000 |  |
Casualty loss, insurance recovery proceeds received, classified as investing activities |  |  |  |  |  |  | 150,000
Casualty loss, insurance recovery proceeds received, classified as operating activities | $ 216,000 |  |  |  |  |  |
Casualty loss, aggregate insurance recovery proceeds received through September 2021 |  |  |  |  | 975,000 |  |
Losses in rental income |  |  |  |  |  |  | $ 251,000
Real Estate in Lake Charles, LA | Other income |  |  |  |  |  |  |
Insurance Recoveries on Hurricane Casualty |  |  |  |  |  |  |
Amount of advance from insurance carrier recognized as a gain in other income |  |  | $ 675,000 |  | $ 695,000 |  |

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