CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Income Statement [Abstract]
Net sales	$ 81,101	$ 62,367	$ 144,301	$ 113,119
Cost of sales	17,229	13,164	31,165	24,774
Gross profit	63,872	49,203	113,136	88,345
Selling, general and administrative expenses:
General and administrative	13,983	11,441	25,923	21,653
Selling and marketing	24,233	18,853	41,503	32,054
Research and development	8,636	8,260	16,577	16,519
Total selling, general and administrative expenses	46,852	38,554	84,003	70,226
Operating income	17,020	10,649	29,133	18,119
Other expense, net:
Interest income (expense), net	43	(5)	37	(12)
Loss on foreign currency transactions	(1,860)	(131)	(2,775)	(1,430)
Royalty income	177	151	450	311
Other income (expense), net	89	51	151	(34)
Total other income (expense), net	(1,551)	66	(2,137)	(1,165)
Income before income taxes	15,469	10,715	26,996	16,954
Provision for income taxes	2,431	2,148	4,356	3,395
Net income	$ 13,038	$ 8,567	$ 22,640	$ 13,559
Net income per share:
Basic	$ 0.27	$ 0.18	$ 0.47	$ 0.29
Diluted	$ 0.26	$ 0.17	$ 0.46	$ 0.27
Weighted average shares outstanding:
Basic	47,889	47,099	47,822	46,858
Diluted	49,223	49,491	49,264	49,373