LOANS RECEIVABLE - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended	18 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Sep. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans originated under the Paycheck Protection Program	$ 24,676	$ 24,057
Loans receivable	$ 94,308		$ 83,136	$ 94,308
Loans, percent current	99.90%		98.80%	99.90%
Loans receivable, net	$ 94,816		$ 83,135	$ 94,816
Accounts Receivable | Customer Concentration Risk | Hospitality Industry
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk	99.80%		99.10%
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	$ 1,400		$ 1,400	1,400
SBA 7(a) loans receivable, paycheck protection program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans originated under the Paycheck Protection Program				26,400
Loans receivable	$ 7,622		$ 14,484	$ 7,622