INVESTMENTS AND FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Funds held for clients
Funds Held For Clients, Restricted Cash, Amortized Cost	$ 3,291	$ 8,115
Funds Held For Clients, Restricted Cash, Gross Unrealized Gains	0	0
Funds Held For Clients, Restricted Cash, Gross Unrealized Losses	(8)	(10)
Funds Held For Clients, Restricted Cash	3,283	8,105
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(299)
Funds Held For Clients, Restricted Cash and Debt Securities, Amortized Cost	77,014	77,011
Funds Held For Clients, Restricted Cash and Debt Securities, Gross Unrealized Gains	402	170
Funds Held For Clients, Restricted Cash and Debt Securities, Gross Unrealized Losses	(307)	(748)
Funds Held For Clients, Restricted Cash and Debt Securities	77,109	76,433
Available-for-sale securities
Funds held for clients
Amortized Cost	73,723	68,896
Gross Unrealized Gains	402	170
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(299)	(738)
Aggregate Estimated Fair Value	73,826	68,328
Corporate debt securities
Funds held for clients
Amortized Cost	66,537	63,253
Gross Unrealized Gains	378	164
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(244)	(619)
Aggregate Estimated Fair Value	66,671	62,798
Municipal bonds
Funds held for clients
Amortized Cost	2,006	3,194
Gross Unrealized Gains	0	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(49)	(104)
Aggregate Estimated Fair Value	1,957	3,090
U.S. Government agency securities
Funds held for clients
Amortized Cost	5,180	2,449
Gross Unrealized Gains	24	6
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(6)	(15)
Aggregate Estimated Fair Value	5,198	2,440
Recurring
Funds held for clients
Total	77,109	76,433
Recurring \| Money market funds
Funds held for clients
Funds held for clients	3,283	8,105
Recurring \| Available-for-sale securities
Funds held for clients
Funds held for clients	73,826	68,328
Recurring \| Level 1
Funds held for clients
Total	3,283	8,105
Recurring \| Level 1 \| Money market funds
Funds held for clients
Funds held for clients	3,283	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	73,826	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	73,826	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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Fair value portion of asset recognized for present right to economic benefit.

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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