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SEGMENTS - Narrative (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 USD ($) segment | Mar. 31, 2022 USD ($)
Segment Reporting Information [Line Items] |  |
Number of operating segments | segment | 3 |
Capital expenditures | $ 360 | $ 397
Marketers | Revenue Benchmark | Top Five Marketers |  |
Segment Reporting Information [Line Items] |  |
Concentration risk | 16.00% | 25.00%
Marketers | Accounts Receivable | Top Five Marketers |  |
Segment Reporting Information [Line Items] |  |
Concentration risk | 17.00% | 23.00%
Marketers | Accounts Receivable | Largest Marketers |  |
Segment Reporting Information [Line Items] |  |
Concentration risk | 10.00% | 10.00%
Supplier Concentration Risk | Financial Institution Partner | Largest FI Partner |  |
Segment Reporting Information [Line Items] |  |
Concentration risk | 70.00% | 75.00%
Supplier Concentration Risk | Financial Institution Partner | Bank Of America, National Association |  |
Segment Reporting Information [Line Items] |  |
Concentration risk |  | 10.00%
Supplier Concentration Risk | Financial Institution Partner | JP Morgan Chase Bank, National Association |  |
Segment Reporting Information [Line Items] |  |
Concentration risk |  | 10.00%
United Kingdom |  |
Segment Reporting Information [Line Items] |  |
Capital expenditures | $ 100 | $ 100

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