CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
REVENUE:
Total revenue	$ 166,277	$ 165,259
COST OF SALES	38,134	36,969
Gross margin	128,143	128,290
OPERATING EXPENSES:
Research and development	34,900	37,985
Selling, general and administrative	17,014	19,252
Amortization of acquired technology and other intangible assets	4,545	4,548
Patent costs	1,906	1,982
Royalty and license expense	114	1,651
Total operating expenses	58,479	65,418
OPERATING INCOME	69,664	62,872
Interest income, net	10,074	9,568
Other income (loss), net	378	(1,943)
Interest and other income (loss), net	10,452	7,625
INCOME BEFORE INCOME TAXES	80,116	70,497
INCOME TAX EXPENSE	(15,672)	(13,644)
NET INCOME	$ 64,444	$ 56,853
NET INCOME PER COMMON SHARE:
BASIC	$ 1.35	$ 1.19
DILUTED	$ 1.35	$ 1.19
WEIGHTED AVERAGE SHARES USED IN COMPUTING NET INCOME PER COMMON SHARE:
BASIC	47,567,295	47,557,959
DILUTED	47,689,657	47,628,492
CASH DIVIDENDS DECLARED PER COMMON SHARE	$ 0.45	$ 0.4
Material Sales
REVENUE:
Total revenue	$ 86,155	$ 93,284
Royalty And License Fees
REVENUE:
Total revenue	73,569	68,268
Contract Research Services
REVENUE:
Total revenue	$ 6,553	$ 3,707