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INVESTMENT IN UNCONSOLIDATED ENTITIES - Narrative (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
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Oct. 31, 2023 USD ($) ft² | Feb. 28, 2023 USD ($) ft² investor | Feb. 28, 2022 USD ($) | Sep. 30, 2024 USD ($) ft² unit | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) ft² unit | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) | Sep. 30, 2022 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Work in progress |  |  |  | $ 27,074,000 |  | $ 27,074,000 |  | $ 15,915,000 |
(Loss) income from unconsolidated entities |  |  |  | (1,239,000) | $ 1,189,000 | (442,000) | $ 1,053,000 |  |
Total investments in unconsolidated entities |  |  |  | 34,196,000 |  | 34,196,000 |  | 33,505,000 |
1910 Sunset Boulevard |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
(Loss) income from unconsolidated entities |  |  |  | (763,000) | (402,000) | (764,000) | (683,000) |  |
Total investments in unconsolidated entities |  |  |  | $ 12,159,000 |  | $ 12,159,000 |  | 12,040,000 |
Ownership Interest |  |  |  | 44.20% |  | 44.20% |  |  |
1910 Sunset Boulevard | Multifamily |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Number of real estate property units | unit |  |  |  | 36 |  | 36 |  |  |
1910 Sunset Boulevard | Office Building |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Rentable area (square feet) | ft² |  |  |  | 104,764 |  | 104,764 |  |  |
1915 Park Project |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity method investment, projected project costs |  |  |  |  |  | $ 6,500,000 |  |  |
4750 Wilshire Boulevard |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity method investment, projected project costs |  | $ 6,200,000 |  |  |  |  |  |  |
Total investments in unconsolidated entities |  |  |  | $ 9,342,000 |  | $ 9,342,000 |  | 9,119,000 |
Percentage of interest acquired |  | 20.00% |  |  |  |  |  |  |
Ownership Interest |  |  |  | 20.00% |  | 20.00% |  |  |
4750 Wilshire Boulevard | Three Co-Investors |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Purchase price |  | $ 34,400,000 |  |  |  |  |  |  |
Number of co-investors | investor |  | 3 |  |  |  |  |  |  |
Percentage of interest acquired |  | 80.00% |  |  |  |  |  |  |
4750 Wilshire Boulevard | Multifamily |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Number of real estate property units | unit |  |  |  | 68 |  | 68 |  |  |
4750 Wilshire Boulevard | Office Building |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Rentable area (square feet) | ft² |  | 30,335 |  | 30,335 |  | 30,335 |  |  |
4750 Wilshire JV |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Ownership Interest |  |  |  | 20.00% |  | 20.00% |  |  |
1902 Park Avenue |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Total investments in unconsolidated entities |  |  |  | $ 6,303,000 |  | $ 6,303,000 |  | 7,082,000 |
Ownership Interest |  |  |  | 50.00% |  | 50.00% |  |  |
1902 Park Avenue | Multifamily |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Number of real estate property units | unit |  |  |  | 75 |  | 75 |  |  |
1015 N Mansfield Avenue |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Total investments in unconsolidated entities |  |  |  | $ 6,392,000 |  | $ 6,392,000 |  | $ 5,264,000 |
Ownership Interest |  |  |  | 28.80% |  | 28.80% |  |  |
1015 N Mansfield Avenue | Office Building |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Rentable area (square feet) | ft² |  |  |  | 44,141 |  | 44,141 |  |  |
Corporate Joint Venture | 1915 Park Project |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Equity method investment, projected project costs |  |  |  |  |  | $ 14,700,000 |  |  |
Work in progress |  |  |  | $ 4,800,000 |  | 4,800,000 |  |  |
Corporate Joint Venture | 4750 Wilshire Boulevard |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Work in progress |  |  |  | 27,900,000 |  | 27,900,000 |  |  |
Total investments in unconsolidated entities |  |  |  | 9,300,000 |  | 9,300,000 |  |  |
Conversion cost |  | $ 31,000,000 |  |  |  |  |  |  |
Corporate Joint Venture | 4750 Wilshire JV |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
(Loss) income from unconsolidated entities |  |  |  | (71,000) | 2,000,000 | 123,000 | 1,500,000 |  |
Corporate Joint Venture | 1902 Park Avenue |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Purchase price |  | $ 19,100,000 |  |  |  |  |  |  |
(Loss) income from unconsolidated entities |  |  |  | (405,000) | $ (422,000) | (929,000) | $ 216,000 |  |
Total investments in unconsolidated entities |  |  |  | 6,300,000 |  | 6,300,000 |  |  |
Ownership Interest |  | 50.00% |  |  |  |  |  |  |
Corporate Joint Venture | 1015 N Mansfield Avenue |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Purchase price | $ 18,000,000 |  |  |  |  |  |  |  |
(Loss) income from unconsolidated entities |  |  |  | 0 |  | 1,100,000 |  |  |
Total investments in unconsolidated entities |  |  |  | $ 6,400,000 |  | $ 6,400,000 |  |  |
Ownership Interest | 28.80% |  |  |  |  |  |  |  |
Percentage of ownership acquired | 100.00% |  |  |  |  |  |  |  |
Corporate Joint Venture | 1015 N Mansfield Avenue | Office Building |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Area of land (square feet) | ft² | 44,141 |  |  |  |  |  |  |  |
Corporate Joint Venture | Mortgage Payable | 4750 Wilshire Boulevard |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Mortgage payable assumed |  | $ 38,500,000 |  |  |  |  |  |  |
Corporate Joint Venture | Mortgage Payable | 1902 Park JV |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 9,600,000 |  |  |  |  |  |  |
Property In Los Angeles, California |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Purchase price |  |  | $ 22,400,000 |  |  |  |  |  |
Property In Los Angeles, California | Corporate Joint Venture |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Purchase price |  |  | $ 51,000,000.0 |  |  |  |  |  |
Property In Los Angeles, California | Corporate Joint Venture | Mortgage Payable |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  | $ 23,900,000

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