EQUITY COMPENSATION PLAN - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands		12 Months Ended
	May 30, 2024	Dec. 31, 2025	Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 1,800
2024 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense		$ 11,138	$ 58,518
Options to purchase common stock issued and outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 39,300
Options to purchase common stock issued and outstanding | Research and development | 2024 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense		6,534	36,875
Options to purchase common stock issued and outstanding | General and administrative | 2024 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense		$ 4,604	$ 21,643