EQUITY COMPENSATION PLAN - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
2024 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 3,175	$ 2,965	$ 8,395	$ 4,002
Stock Options | 2017 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense				51,534
Stock Options | Research and development | 2017 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense				32,809
Stock Options | Research and development | 2024 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	2,048	1,717	4,886	2,320
Stock Options | General and administrative | 2017 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense				18,725
Stock Options | General and administrative | 2024 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 1,127	$ 1,248	$ 3,509	$ 1,682