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INVESTMENTS AND FAIR VALUE MEASUREMENTS - Debt Securities, Available-for-sale (Details) $ in Thousands | Dec. 31, 2025 USD ($) security | Dec. 31, 2024 USD ($) security
--- | --- | ---
Funds Held for Clients |  |
Amortized Cost | $ 88,217 | $ 68,896
Gross Unrealized Gains | 529 | 170
Gross Unrealized Losses | (94) | (738)
Aggregate Estimated Fair Value | 88,652 | 68,328
Funds Held For Clients, Restricted Cash and Debt Securities | 90,436 | 76,433
Funds Held For Clients, Restricted Cash and Debt Securities, Gross Unrealized Losses | (97) | (748)
Funds Held For Clients, Restricted Cash and Debt Securities, Gross Unrealized Gains | 529 | 170
Funds Held For Clients, Restricted Cash and Debt Securities, Amortized Cost | $ 90,004 | $ 77,011
Number of securities in unrealized gain position | security | 127 | 45
Number of securities in unrealized loss position | security | 27 | 89
Funds Held For Clients, Restricted Cash, Amortized Cost | $ 1,787 | $ 8,115
Funds Held For Clients, Restricted Cash, Gross Unrealized Losses | (3) | (10)
Funds Held For Clients, Restricted Cash | 1,784 | 8,105
Funds Held For Clients, Restricted Cash, Gross Unrealized Gains | 0 | 0
Individually |  |
Funds Held for Clients |  |
Gross Unrealized Losses | (13) | (38)
Corporate debt securities |  |
Funds Held for Clients |  |
Amortized Cost | 83,160 | 63,253
Gross Unrealized Gains | 501 | 164
Gross Unrealized Losses | (77) | (619)
Aggregate Estimated Fair Value | 83,584 | 62,798
Municipal bonds |  |
Funds Held for Clients |  |
Amortized Cost | 1,542 | 3,194
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (17) | (104)
Aggregate Estimated Fair Value | 1,525 | 3,090
U.S. Government agency securities |  |
Funds Held for Clients |  |
Amortized Cost | 3,515 | 2,449
Gross Unrealized Gains | 28 | 6
Gross Unrealized Losses | 0 | (15)
Aggregate Estimated Fair Value | $ 3,543 | $ 2,440

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