CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Net sales	$ 394,879	$ 420,457	$ 542,751
Cost of sales	280,885	322,897	390,459
Gross profit	113,994	97,560	152,292
Research and development expenses	29,723	31,281	32,452
Selling, general and administrative expenses	91,811	98,490	105,292
Factory restructuring charges (Note 13)	3,585	4,015	0
Legal judgment (Note 13)	4,172	0	0
Goodwill impairment (Note 7)	0	49,075	0
Operating income (loss)	(15,297)	(85,301)	14,548
Interest income (expense), net	(3,361)	(4,332)	(2,200)
Other income (expense), net	60	(2,621)	(955)
Income (loss) before provision for income taxes	(18,598)	(92,254)	11,393
Provision for income taxes	5,431	5,984	10,986
Net income (loss)	$ (24,029)	$ (98,238)	$ 407
Earnings (loss) per share:
Basic (in dollars per share)	$ (1.85)	$ (7.64)	$ 0.03
Diluted (in dollars per share)	$ (1.85)	$ (7.64)	$ 0.03
Shares used in computing earnings (loss) per share:
Basic (in shares)	12,959	12,855	12,703
Diluted (in shares)	12,959	12,855	12,779