REVENUE - Summary of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 59,030	$ 63,983
Commodity Contract Asset, Current	391		$ 28
Deferred revenue	2,769		1,751
Deferred revenue	2,860		2,084
Bridg Acquisition
Disaggregation of Revenue [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss, Current	391		28
Deferred implementation costs, net	0		0
Deferred revenue	2,768		1,750
Contract with Customer, Liability, Noncurrent	92		$ 334
Cost per Served Sale
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	39,270	38,715
Cost per Redemption
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	17,935	23,019
Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,825	2,249
Subscription revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	5,301	3,915
Other revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	0	30
Bridg platform revenue
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 5,301	$ 3,945