INCOME TAXES - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax asset:
Capitalized research expenditures	$ 38,485	$ 3,150
Accruals and reserves	6,944	4,733
Retirement plan	13,495	14,560
Deferred revenue	2,077	11,361
Tax credit carry forwards	8,100	6,156
Lease liabilities	7,230	5,360
Stock-based compensation	1,454	1,110
Other	3,400	1,020
Deferred Tax Assets, Gross	81,185	47,450
Valuation allowance	(11,087)	(5,911)
Deferred tax assets	70,098	41,539
Deferred tax liability:
Accruals and reserves	(11,937)	(8,086)
Deferred tax liabilities	(11,937)	(8,086)
Net deferred tax assets	$ 58,161	$ 33,453