RELATED PARTY MANAGEMENT SERVICES BUSINESS - Summary of Amounts Due (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Related Party [Member]
Related Party Transaction [Line Items]
Other receivables	$ 1,565	$ 1,300
Investee | Alpine Income Property Trust, Inc.
Related Party Transaction [Line Items]
Other receivables	1,565	1,300
Investee | Management Services Fee | Alpine Income Property Trust, Inc.
Related Party Transaction [Line Items]
Other receivables	1,095	993
Investee | Dividend Receivable | Alpine Income Property Trust, Inc.
Related Party Transaction [Line Items]
Other receivables	337	337
Investee | Other | Alpine Income Property Trust, Inc.
Related Party Transaction [Line Items]
Other receivables	$ 133
Other liability		$ (30)