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INVESTMENTS AND FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Funds held for clients |  |
Funds Held For Clients, Restricted Cash, Amortized Cost | $ 1,251 | $ 8,115
Funds Held For Clients, Restricted Cash, Gross Unrealized Gains | 0 | 0
Funds Held For Clients, Restricted Cash, Gross Unrealized Losses | (1) | (10)
Funds Held For Clients, Restricted Cash | 1,250 | 8,105
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (151) |
Funds Held For Clients, Restricted Cash and Debt Securities, Amortized Cost | 85,309 | 77,011
Funds Held For Clients, Restricted Cash and Debt Securities, Gross Unrealized Gains | 484 | 170
Funds Held For Clients, Restricted Cash and Debt Securities, Gross Unrealized Losses | (152) | (748)
Funds Held For Clients, Restricted Cash and Debt Securities | 85,641 | 76,433
Available-for-sale securities |  |
Funds held for clients |  |
Amortized Cost | 84,058 | 68,896
Gross Unrealized Gains | 484 | 170
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (151) | (738)
Aggregate Estimated Fair Value | 84,391 | 68,328
Corporate debt securities |  |
Funds held for clients |  |
Amortized Cost | 78,556 | 63,253
Gross Unrealized Gains | 461 | 164
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (118) | (619)
Aggregate Estimated Fair Value | 78,899 | 62,798
Municipal bonds |  |
Funds held for clients |  |
Amortized Cost | 2,004 | 3,194
Gross Unrealized Gains | 0 | 0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (33) | (104)
Aggregate Estimated Fair Value | 1,971 | 3,090
U.S. Government agency securities |  |
Funds held for clients |  |
Amortized Cost | 3,498 | 2,449
Gross Unrealized Gains | 23 | 6
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | 0 | (15)
Aggregate Estimated Fair Value | 3,521 | 2,440
Recurring |  |
Funds held for clients |  |
Total | 85,641 | 76,433
Recurring | Money market funds |  |
Funds held for clients |  |
Funds held for clients | 1,250 | 8,105
Recurring | Available-for-sale securities |  |
Funds held for clients |  |
Funds held for clients | 84,391 | 68,328
Recurring | Level 1 |  |
Funds held for clients |  |
Total | 1,250 | 8,105
Recurring | Level 1 | Money market funds |  |
Funds held for clients |  |
Funds held for clients | 1,250 | 8,105
Recurring | Level 1 | Available-for-sale securities |  |
Funds held for clients |  |
Funds held for clients | 0 | 0
Recurring | Level 2 |  |
Funds held for clients |  |
Total | 84,391 | 68,328
Recurring | Level 2 | Money market funds |  |
Funds held for clients |  |
Funds held for clients | 0 | 0
Recurring | Level 2 | Available-for-sale securities |  |
Funds held for clients |  |
Funds held for clients | 84,391 | 68,328
Recurring | Level 3 |  |
Funds held for clients |  |
Total | 0 | 0
Recurring | Level 3 | Money market funds |  |
Funds held for clients |  |
Funds held for clients | 0 | 0
Recurring | Level 3 | Available-for-sale securities |  |
Funds held for clients |  |
Funds held for clients | $ 0 | $ 0

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