PROVISION (BENEFIT) FOR INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S. and foreign components of income before income taxes [Abstract]
U.S. operations	$ 2,995	$ 17,250	$ 241
Foreign operations	42,912	166,176	175,894
INCOME BEFORE INCOME TAXES	45,907	183,426	176,135
Current provision (benefit):
Federal	(1,193)	19,740	23,648
State	3	2	2
Foreign	1,331	1,079	1,608
Current provision (benefit)	141	20,821	25,258
Deferred provision (benefit):
Federal	(9,178)	(7,962)	(11,449)
State	0	0	0
Foreign	(791)	(284)	(2,087)
Deferred provision (benefit)	(9,969)	(8,246)	(13,536)
Income Tax Expense (Benefit), Total	$ (9,828)	$ 12,575	$ 11,722
Effective income tax rate reconciliation [Abstract]
Provision (benefit) computed at Federal statutory rate	21.00%	21.00%	21.00%
Business tax credits	(12.20%)	(3.70%)	(3.60%)
Stock-based compensation	(0.10%)	(1.60%)	(0.60%)
Foreign income taxed at different rate	(17.60%)	(18.50%)	(23.80%)
GILTI inclusion	4.10%	8.50%	13.10%
Uncertain tax positions	(18.60%)	(0.10%)	(0.60%)
Valuation allowance	4.30%	1.30%	1.30%
Other	(2.30%)		(0.10%)
Effective Income Tax Rate Reconciliation, Percent, Total	(21.40%)	6.90%	6.70%
Components of deferred income tax assets (liabilities) [Abstract]
Capitalized R&D costs	$ 30,886	$ 20,666
Other reserves and accruals	861	2,516
Tax credit carry-forwards	28,223	26,154
Stock compensation	1,543	1,559
Capital losses	141	150
Net operating loss	2,269	2,217
Other	465	439
Valuation allowance	(31,031)	(29,036)
Deferred tax assets, net of valuation allowance	33,357	24,665
Depreciation	(5,040)	(5,596)
Deferred tax liabilities	(5,040)	(5,596)
Net deferred tax assets	28,317	19,069
Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits, balance at beginning of period	23,386	21,363	$ 21,051
Gross increase for tax positions of current Year	605	2,188	2,068
Gross decrease for tax positions of prior years	0	0	0
Statute of limitation release for tax positions of prior years	(7,602)	(165)	(1,756)
Unrecognized tax benefits, balance at end of period	16,389	23,386	21,363
Unrecognized tax benefits [Abstract]
Unrecognized tax benefits, balance at end of period	16,389	23,386	$ 21,363
Income tax benefit that would be recorded if unrecognized tax benefits are recognized	4,500
Income tax interest and penalties accrued	300	$ 1,200
Federal
Unrecognized tax benefits [Abstract]
Unrecognized tax benefits, period increase	7,600
State and Local Jurisdiction | California Taxing Authority
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	44,200
Research Tax Credit Carryforward | State and Local Jurisdiction | California Taxing Authority
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	40,700
Research Tax Credit Carryforward | State and Local Jurisdiction | New Jersey Division of Taxation
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	800
Research Tax Credit Carryforward | Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount	$ 3,800
Earliest Tax Year | State and Local Jurisdiction | California Taxing Authority
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Date	Jan. 01, 2032
Earliest Tax Year | Research Tax Credit Carryforward | State and Local Jurisdiction | New Jersey Division of Taxation
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Jan. 01, 2029
Earliest Tax Year | Research Tax Credit Carryforward | Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Jan. 01, 2030