CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
REVENUE:
Total revenue	$ 165,259	$ 130,467
COST OF SALES	36,969	32,970
Gross margin	128,290	97,497
OPERATING EXPENSES:
Research and development	37,985	31,423
Selling, general and administrative	19,252	15,396
Amortization of acquired technology and other intangible assets	4,548	2,891
Patent costs	1,982	2,255
Royalty and license expense	1,651	164
Total operating expenses	65,418	52,129
OPERATING INCOME	62,872	45,368
Interest income, net	9,568	6,967
Other loss, net	(1,943)	(703)
Interest and other loss, net	7,625	6,264
INCOME BEFORE INCOME TAXES	70,497	51,632
INCOME TAX EXPENSE	(13,644)	(11,793)
NET INCOME	$ 56,853	$ 39,839
NET INCOME PER COMMON SHARE:
BASIC	$ 1.19	$ 0.83
DILUTED	$ 1.19	$ 0.83
WEIGHTED AVERAGE SHARES USED IN COMPUTING NET INCOME PER OMMON SHARE:
BASIC	47,557,959	47,523,593
DILUTED	47,628,492	47,567,007
CASH DIVIDENDS DECLARED PER COMMON SHARE	$ 0.4	$ 0.35
Material Sales
REVENUE:
Total revenue	$ 93,284	$ 70,190
Royalty And License Fees
REVENUE:
Total revenue	68,268	55,210
Contract Research Services
REVENUE:
Total revenue	$ 3,707	$ 5,067