FAIR VALUE MEASUREMENTS, CASH EQUIVALENTS AND MARKETABLE SECURITIES - Schedule of Cash Equivalents and Marketable Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Total cash equivalents	$ 66,552	$ 247,236
Amortized Cost	820,379	901,563
Gross Unrealized Gains	17	376
Gross Unrealized Losses	(83)	0
Estimated Fair Value	820,313	901,939
U.S. government treasury bills
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Amortized Cost	753,827	838,368
Gross Unrealized Gains	17	376
Gross Unrealized Losses	(83)	0
Estimated Fair Value	753,761	838,744
Money market funds
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Total cash equivalents	$ 66,552	$ 63,195