CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Net sales	$ 102,073	$ 107,095	$ 284,425	$ 322,863
Cost of sales	71,341	86,683	201,753	253,141
Gross profit	30,732	20,412	82,672	69,722
Research and development expenses	7,338	7,658	22,679	24,502
Selling, general and administrative expenses	22,872	23,097	68,213	75,144
Factory restructuring charges	104	3,690	2,723	3,690
Goodwill impairment	0	0	0	49,075
Operating income (loss)	418	(14,033)	(10,943)	(82,689)
Interest income (expense), net	(891)	(1,216)	(2,656)	(3,288)
Other income (expense), net	274	(851)	105	(1,767)
Income (loss) before provision for income taxes	(199)	(16,100)	(13,494)	(87,744)
Provision for (benefit from) income taxes	2,459	3,262	6,006	3,392
Net income (loss)	$ (2,658)	$ (19,362)	$ (19,500)	$ (91,136)
Earnings (loss) per share:
Basic (in dollars per share)	$ (0.20)	$ (1.50)	$ (1.51)	$ (7.10)
Diluted (in dollars per share)	$ (0.20)	$ (1.50)	$ (1.51)	$ (7.10)
Shares used in computing earnings (loss) per share:
Basic (in shares)	12,985	12,911	12,935	12,839
Diluted (in shares)	12,985	12,911	12,935	12,839