REVENUE, NET AND CERTAIN STATEMENT OF OPERATIONS COMPONENTS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue
Total revenue, net	$ 33,866	$ 35,764	$ 67,835	$ 71,838
Subscription fees
Disaggregation of Revenue
Total revenue, net	30,770	32,864	61,715	66,108
Interchange
Disaggregation of Revenue
Total revenue, net	5,924	5,297	11,465	10,331
Other
Disaggregation of Revenue
Total revenue, net	122	87	241	157
Cashback rewards
Disaggregation of Revenue
Total revenue, net	$ (2,950)	$ (2,484)	$ (5,586)	$ (4,758)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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