LOANS RECEIVABLE - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans originated under the Paycheck Protection Program	$ 25,393	$ 9,898	$ 18,579
Loans receivable	83,136	67,532
Loans receivable, net	$ 83,135	$ 68,079
Accounts Receivable | Customer Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percent	99.10%	98.70%
SBA 7(a) loans receivable, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans originated under the Paycheck Protection Program	$ 16,000
Loans receivable	14,484	$ 0
SBA 7(a) loans receivable, subject to credit risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 32,226	$ 25,689
Loans, percent current	98.80%	99.60%
SBA 7(a) loans receivable, subject to credit risk | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	$ 1,400	$ 1,400