CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands		12 Months Ended
		Jan. 02, 2026	Dec. 27, 2024	Dec. 29, 2023
Income Statement [Abstract]
Net sales		$ 239,442,000	$ 313,901,000	$ 322,415,000
Cost of sales		57,022,000	74,319,000	69,764,000
Gross profit		182,420,000	239,582,000	252,651,000
Selling, general and administrative expenses:
General and administrative		85,783,000	89,898,000	72,319,000
Selling and marketing		102,528,000	116,978,000	111,757,000
Research and development		40,055,000	45,317,000	40,478,000
Merger transaction and related costs		17,135,000
Restructuring, impairment and related charges		28,632,000
Total selling, general and administrative expenses		274,133,000	252,193,000	224,554,000
Operating income (loss)		(91,713,000)	(12,611,000)	28,097,000
Other income, net:
Interest income, net		4,594,000	5,911,000	6,986,000
Gain (loss) on foreign currency transactions	[1]	2,603,000	(3,675,000)	(1,909,000)
Royalty income			508,000	74,000
Other income, net		2,253,000	815,000	448,000
Total other income, net		9,450,000	3,559,000	5,599,000
Income (loss) before income taxes		(82,263,000)	(9,052,000)	33,696,000
Provision (benefit) for income taxes		(1,815,000)	11,156,000	12,349,000
Net income (loss)		$ (80,448,000)	$ (20,208,000)	$ 21,347,000
Net income (loss) per share:
Basic		$ (1.62)	$ (0.41)	$ 0.44
Diluted		$ (1.62)	$ (0.41)	$ 0.43
Weighted average shares outstanding:
Basic		49,568	49,125	48,523
Diluted		49,568	49,125	49,427

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