STOCK-BASED COMPENSATION- Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total	$ 69,400	$ 910,147	$ 130,052	$ 918,843
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total	27,614	217,975	50,341	221,361
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total	28,159	530,249	53,562	533,952
Location, Statement of Income, Balance [Axis]: us-gaap:SellingAndMarketingExpense
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total	4,390	42,406	8,390	42,889
Location, Statement of Income, Balance [Axis]: chym:MemberSupportAndOperations
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total	$ 9,237	$ 119,517	$ 17,759	$ 120,641

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details