Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Net sales		$ 401,779	$ 636,322	$ 812,775
Cost and expenses:
Cost of sales (1)	[1]	221,485	333,454	429,449
Research and development		84,797	88,571	92,589
Selling, general and administrative		128,037	132,249	131,390
Amortization of purchased intangible assets		39,087	36,355	33,185
Restructuring charges (Note 4)		41	2,421	605
Costs and Expenses		473,447	593,050	687,218
Income (loss) from operations		(71,668)	43,272	125,557
Other (expense) income:
Interest expense		(618)	(3,382)	(4,177)
Interest income		9,976	11,504	4,012
Foreign transaction gain (loss)		(2,395)	(5,209)	1,635
Loss on extinguishment of debt		(241)	(369)	(312)
Income (loss) before taxes		(64,946)	45,816	126,715
Income tax provision		4,872	17,660	29,868
Net income (loss)		$ (69,818)	$ 28,156	$ 96,847
Income (loss) per share:
Basic: (in dollars per share)		$ (1.49)	$ 0.59	$ 2.01
Diluted: (in dollars per share)		$ (1.49)	$ 0.59	$ 1.98
Weighted average shares used in computing income (loss) per share:
Basic (in shares)		46,908	47,486	48,178
Diluted (in shares)		46,908	48,025	48,799

[1] Excludes amortization of $30,008, $28,418, and $26,023 for the years ended December 28, 2024, December 30, 2023, and December 31, 2022, respectively.