FINANCING RECEIVABLES - Short term Payment Plans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Less: allowance for losses	$ (287)	$ (325)
Short-term payment plans, net	5,740	6,488
Short-Term Payment Plans
Financing Receivable, Allowance for Credit Loss [Line Items]
Short-term payment plans, gross	74	121
Less: allowance for losses	(4)	(6)
Short-term payment plans, net	$ 70	$ 115