CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
REVENUE:
Total revenue	$ 141,077	$ 160,556	$ 418,109	$ 447,587
COST OF SALES	34,248	37,396	99,357	97,798
Gross margin	106,829	123,160	318,752	349,789
OPERATING EXPENSES:
Research and development	33,099	30,414	96,840	85,156
Selling, general and administrative	18,084	18,442	50,557	59,373
Amortization of acquired technology and other intangible assets	4,557	3,562	11,442	14,562
Patent costs	2,572	2,018	7,056	6,075
Royalty and license expense	81	261	414	596
Total operating expenses	58,393	54,697	166,309	165,762
OPERATING INCOME	48,436	68,463	152,443	184,027
Interest income, net	7,136	2,432	20,301	4,306
Other loss, net	(1,693)	(804)	(3,180)	(749)
Interest and other income, net	5,443	1,628	17,121	3,557
INCOME BEFORE INCOME TAXES	53,879	70,091	169,564	187,584
Income tax expense (benefit)	(2,363)	(16,636)	(28,531)	(42,657)
NET INCOME	$ 51,516	$ 53,455	$ 141,033	$ 144,927
NET INCOME PER COMMON SHARE:
BASIC	$ 1.08	$ 1.12	$ 2.95	$ 3.04
DILUTED	$ 1.08	$ 1.12	$ 2.95	$ 3.04
WEIGHTED AVERAGE SHARES USED IN COMPUTING NET INCOME PER OMMON SHARE:
BASIC	47,570,099	47,396,495	47,555,734	47,386,426
DILUTED	47,632,431	47,466,934	47,609,692	47,455,893
CASH DIVIDENDS DECLARED PER COMMON SHARE	$ 0.35	$ 0.3	$ 1.05	$ 0.9
Material Sales
REVENUE:
Total revenue	$ 92,492	$ 84,182	$ 239,789	$ 242,742
Royalty And License Fees
REVENUE:
Total revenue	45,915	71,450	165,524	191,530
Contract Research Services
REVENUE:
Total revenue	$ 2,670	$ 4,924	$ 12,796	$ 13,315