CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
REVENUE:
Total revenue	$ 143,618	$ 117,079	$ 407,278	$ 287,324
COST OF SALES	31,481	23,378	82,748	58,480
Gross margin	112,137	93,701	324,530	228,844
OPERATING EXPENSES:
Research and development	25,327	20,814	72,733	61,708
Selling, general and administrative	20,960	13,579	57,603	45,129
Amortization of acquired technology and other intangible assets	5,505	5,494	16,490	16,474
Patent costs	2,359	2,095	6,003	5,591
Royalty and license expense	258	3,293	519	8,195
Total operating expenses	54,409	45,275	153,348	137,097
OPERATING INCOME	57,728	48,426	171,182	91,747
Interest income, net	137	1,029	345	4,444
Other income, net	(102)	262	178	634
Interest and other income, net	35	1,291	523	5,078
INCOME BEFORE INCOME TAXES	57,763	49,717	171,705	96,825
INCOME TAX EXPENSE	(11,654)	(9,217)	(33,368)	(17,355)
NET INCOME	$ 46,109	$ 40,500	$ 138,337	$ 79,470
NET INCOME PER COMMON SHARE:
BASIC	$ 0.97	$ 0.85	$ 2.91	$ 1.67
DILUTED	$ 0.97	$ 0.85	$ 2.90	$ 1.67
WEIGHTED AVERAGE SHARES USED IN COMPUTING NET INCOME PER COMMON SHARE:
BASIC	47,291,192	47,227,061	47,286,927	47,182,625
DILUTED	47,362,575	47,260,331	47,355,583	47,212,660
CASH DIVIDENDS DECLARED PER COMMON SHARE	$ 0.20	$ 0.15	$ 0.60	$ 0.45
Material Sales
REVENUE:
Total revenue	$ 75,609	$ 68,709	$ 232,855	$ 167,211
Royalty And License Fees
REVENUE:
Total revenue	63,939	44,550	163,037	110,008
Contract Research Services
REVENUE:
Total revenue	$ 4,070	$ 3,820	$ 11,386	$ 10,105