Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenues	$ 166,395	$ 203,760	$ 418,137	$ 695,413
Cost of revenues	76,082	84,735	196,172	278,753
Gross profit	90,313	119,025	221,965	416,660
Operating expenses:
Research and development	83,228	79,042	249,787	254,340
Selling, general and administrative	36,793	27,766	109,041	113,363
Operating expenses	120,021	106,808	358,828	367,703
Operating income (loss)	(29,708)	12,217	(136,863)	48,957
Other income (expense):
Interest income and other, net	3,487	2,938	9,009	15,554
Interest expense	(278)	(1,359)	(1,050)	(4,611)
Income (loss) before income taxes	(26,499)	13,796	(128,904)	59,900
Provision for income taxes	2,005	3,388	38,283	23,479
Equity-method loss	0	(60)	0	(1,150)
Net income (loss)	$ (28,504)	$ 10,348	$ (167,187)	$ 35,271
Earnings (loss) per share:
Basic (in dollars per share)	$ (0.88)	$ 0.33	$ (5.21)	$ 1.11
Diluted (in dollars per share)	$ (0.88)	$ 0.32	$ (5.21)	$ 1.07
Weighted-average common shares outstanding:
Basic (in shares)	32,309	31,796	32,114	31,789
Diluted (in shares)	32,309	32,078	32,114	32,919