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SIGNIFICANT ACCOUNTING POLICIES (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2020 property | Jun. 30, 2020 building | Dec. 31, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |
Cash equivalents | $ 6,000,000.0 | $ 6,000,000.0 |  | $ 6,000,000.0 |  |  |  | $ 5,700,000
Restricted cash | 2,700,000 | 2,700,000 |  | 2,700,000 |  |  |  | $ 4,700,000
Number of real estate properties held for sale | property |  |  |  |  |  | 3 |  |
Asset impairment charge | $ 845,000 | $ 845,674 | $ 0 | $ 845,674 | $ 0 |  |  |
Model Home |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |
Number of real estate properties held for sale | property |  |  |  |  |  | 4 |  |
Executive Office Park |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |
Buildings classified as held for sale | building |  |  |  |  |  |  | 1 |
Total buildings held-for-sale |  |  |  |  |  | 4 | 4 |

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