Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Net sales		$ 452,956	$ 401,779	$ 636,322
Cost and expenses:
Cost of sales	[1]	259,337	221,485	333,454
Research and development		92,213	84,797	88,571
Selling, general and administrative		123,566	128,037	132,249
Amortization of purchased intangible assets		37,466	39,087	36,355
Restructuring charges		10,143	41	2,421
Costs and Expenses		522,725	473,447	593,050
Loss from operations		(69,769)	(71,668)	43,272
Other (expense) income:
Interest expense		(2,054)	(618)	(3,382)
Interest income		8,040	9,976	11,504
Foreign transaction loss		(783)	(2,395)	(5,209)
Pension curtailment gain		2,159	0	0
Loss on extinguishment of debt		0	(241)	(369)
Income (loss) before taxes		(62,407)	(64,946)	45,816
Income tax provision		11,866	4,872	17,660
Net income (loss)		$ (74,273)	$ (69,818)	$ 28,156
Income (loss) per share:
Basic (in dollars per share)		$ (1.59)	$ (1.49)	$ 0.59
Diluted (in dollars per share)		$ (1.59)	$ (1.49)	$ 0.59
Weighted average shares used in computing income (loss) per share:
Basic (in shares)		46,723	46,908	47,486
Diluted (in shares)		46,723	46,908	48,025

[1] Excludes amortization of purchased intangibles of $28,086, $30,008, and $28,418 for the years ended December 27, 2025, December 28, 2024, and December 30, 2023, respectively.