CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 27, 2024	Dec. 29, 2023	Dec. 30, 2022
Income Statement [Abstract]
Net sales		$ 313,901	$ 322,415	$ 284,391
Cost of sales		74,319	69,764	61,008
Gross profit		239,582	252,651	223,383
Selling, general and administrative expenses:
General and administrative		89,898	72,319	54,742
Selling and marketing		108,322	107,834	88,856
Research and development		53,973	44,401	35,983
Total selling, general and administrative expenses		252,193	224,554	179,581
Operating income (loss)		(12,611)	28,097	43,802
Other income, net:
Interest income, net		5,911	6,986	2,448
Loss on foreign currency transactions	[1]	(3,675)	(1,909)	(1,707)
Royalty income		508	74	804
Other income, net		815	448	205
Total other income, net		3,559	5,599	1,750
Income (loss) before income taxes		(9,052)	33,696	45,552
Provision for income taxes		11,156	12,349	5,887
Net income (loss)		$ (20,208)	$ 21,347	$ 39,665
Net income (loss) per share:
Basic		$ (0.41)	$ 0.44	$ 0.83
Diluted		$ (0.41)	$ 0.43	$ 0.80
Weighted average shares outstanding:
Basic		49,125	48,523	47,987
Diluted		49,125	49,427	49,380

[1] Shown as a separate line item on the Consolidated Statements of Operations.