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INVESTMENTS AND FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - Recurring - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Funds held for clients |  |
Total | $ 73,693 | $ 59,385
Liabilities: |  |
Contingent purchase consideration |  | 2,955
Total |  | 2,955
Money market funds |  |
Funds held for clients |  |
Funds held for clients | 4,704 | 2,829
Available-for-sale securities |  |
Funds held for clients |  |
Funds held for clients | 68,989 | 56,556
Level 1 |  |
Funds held for clients |  |
Total | 4,704 | 2,829
Liabilities: |  |
Contingent purchase consideration |  | 0
Total |  | 0
Level 1 | Money market funds |  |
Funds held for clients |  |
Funds held for clients | 4,704 | 2,829
Level 1 | Available-for-sale securities |  |
Funds held for clients |  |
Funds held for clients | 0 | 0
Level 2 |  |
Funds held for clients |  |
Total | 68,989 | 56,556
Liabilities: |  |
Contingent purchase consideration |  | 0
Total |  | 0
Level 2 | Money market funds |  |
Funds held for clients |  |
Funds held for clients | 0 | 0
Level 2 | Available-for-sale securities |  |
Funds held for clients |  |
Funds held for clients | 68,989 | 56,556
Level 3 |  |
Funds held for clients |  |
Total | 0 | 0
Liabilities: |  |
Contingent purchase consideration |  | 2,955
Total |  | 2,955
Level 3 | Money market funds |  |
Funds held for clients |  |
Funds held for clients | 0 | 0
Level 3 | Available-for-sale securities |  |
Funds held for clients |  |
Funds held for clients | $ 0 | $ 0

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- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
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