INCOME TAXES - Significant Components of Company's Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Net operating loss	$ 227,150	$ 206,684
Tax credits	109,666	96,711
Lease liabilities	17,122	17,108
Stock-based compensation	8,408	9,824
Capitalized software cost	73,163	91,563
Accrued bonus	11,265	0
Other	11,596	9,011
Total deferred tax assets	458,370	430,901
Valuation allowance	(397,321)	(372,901)	$ (324,422)	$ (282,337)
Total deferred tax assets, net	61,049	58,000
Deferred tax liabilities:
Lease assets	(11,303)	(12,264)
Acquired intangible assets	(13,732)	(23,545)
Contract cost asset	(30,579)	(18,922)
Prepaid and accrued expenses	(3,374)	(3,816)
Other	(1,078)	(897)
Total deferred tax liabilities	(60,066)	(59,444)
Total	$ 983
Total		$ (1,444)