CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2024	Sep. 29, 2023	Sep. 27, 2024	Sep. 29, 2023
Income Statement [Abstract]
Net sales	$ 88,590	$ 80,308	$ 264,951	$ 246,142
Cost of sales	20,103	16,670	57,017	54,216
Gross profit	68,487	63,638	207,934	191,926
Selling, general and administrative expenses:
General and administrative	21,685	19,266	68,554	55,461
Selling and marketing	26,623	26,607	82,150	85,238
Research and development	14,497	11,470	41,931	33,535
Total selling, general and administrative expenses	62,805	57,343	192,635	174,234
Operating income	5,682	6,295	15,299	17,692
Other income (expense), net:
Interest income, net	1,407	1,690	4,358	5,287
Gain (loss) on foreign currency transactions	5,931	(1,384)	585	(3,240)
Royalty income		74	508	74
Other income, net	139	71	532	144
Total other income, net	7,477	451	5,983	2,265
Income before income taxes	13,159	6,746	21,282	19,957
Provision for income taxes	3,179	1,929	7,262	6,366
Net income	$ 9,980	$ 4,817	$ 14,020	$ 13,591
Net income per share:
Basic	$ 0.2	$ 0.1	$ 0.29	$ 0.28
Diluted	$ 0.2	$ 0.1	$ 0.28	$ 0.27
Weighted average shares outstanding:
Basic	49,199	48,613	49,078	48,426
Diluted	49,731	49,370	49,614	49,494