CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 139,101	$ 150,491	$ 271,511	$ 301,033
Cost of sales	99,730	105,829	195,872	209,972
Gross profit	39,371	44,662	75,639	91,061
Research and development expenses	8,637	7,676	16,443	15,618
Selling, general and administrative expenses	25,237	27,965	54,260	57,811
Operating income	5,497	9,021	4,936	17,632
Interest income (expense), net	(183)	(127)	(479)	(235)
Other income (expense), net	(694)	(17)	(334)	6
Income before provision for income taxes	4,620	8,877	4,123	17,403
Provision for income taxes	1,632	3,284	4,045	4,817
Net income	$ 2,988	$ 5,593	$ 78	$ 12,586
Earnings per share:
Basic (in dollars per share)	$ 0.24	$ 0.41	$ 0.01	$ 0.92
Diluted (in dollars per share)	$ 0.23	$ 0.40	$ 0.01	$ 0.89
Shares used in computing earnings per share:
Basic (in shares)	12,659	13,672	12,736	13,737
Diluted (in shares)	12,715	13,926	12,847	14,062