FAIR VALUE OF FINANCIAL INSTRUMENTS - Unobservable Inputs (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Carrying Amount
Liabilities:
Fixed rate mortgages payable	$ 269,100	$ 163,700
Junior subordinated notes	27,070	27,070
Carrying Amount | SBA 7(a) loans receivable, subject to loan-backed notes
Assets:
Loans receivable	34,452	43,263
Carrying Amount | SBA 7(a) loans receivable, subject to credit risk
Assets:
Loans receivable	18,850	10,539
Carrying Amount | SBA 7(a) loans receivable, subject to secured borrowings
Assets:
Loans receivable	1,383	3,105
Carrying Amount | SBA 7(a) loans receivable, held for sale
Assets:
Loans receivable	1,525	98
Estimated Fair Value | Level 3 | Fair Value, Nonrecurring
Liabilities:
Fixed rate mortgages payable	233,364	158,529
Junior subordinated notes	25,415	24,667
Estimated Fair Value | Level 3 | SBA 7(a) loans receivable, subject to loan-backed notes | Fair Value, Nonrecurring
Assets:
Loans receivable	37,657	46,701
Estimated Fair Value | Level 3 | SBA 7(a) loans receivable, subject to credit risk | Fair Value, Nonrecurring
Assets:
Loans receivable	18,994	10,482
Estimated Fair Value | Level 3 | SBA 7(a) loans receivable, subject to secured borrowings | Fair Value, Nonrecurring
Assets:
Loans receivable	1,383	3,105
Estimated Fair Value | Level 3 | SBA 7(a) loans receivable, held for sale | Fair Value, Nonrecurring
Assets:
Loans receivable	$ 1,600	$ 82