Note 4 - Restructuring Charges - Charges (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2025	Mar. 30, 2024
Restructuring Charges	$ 6,628	$ 9
Poway Volume Manufacturing Transition [Member]
Restructuring Charges	400
2025 Strategic Restructuring [Member]
Restructuring Charges	6,200
Employee Severance [Member] | Poway Volume Manufacturing Transition [Member]
Accrued restructuring, balance	0
Restructuring Charges	243
Amounts paid or charged	(243)
Accrued restructuring, balance	0
Employee Severance [Member] | 2025 Strategic Restructuring [Member]
Accrued restructuring, balance	0
Restructuring Charges	6,188
Amounts paid or charged	(2,038)
Accrued restructuring, balance	4,224
Impact of currency exchange	74
Other Restructuring [Member] | Poway Volume Manufacturing Transition [Member]
Accrued restructuring, balance	0
Restructuring Charges	149
Amounts paid or charged	(128)
Accrued restructuring, balance	21
Other Restructuring [Member] | 2025 Strategic Restructuring [Member]
Accrued restructuring, balance	0
Restructuring Charges	48
Amounts paid or charged	(39)
Accrued restructuring, balance	9
Impact of currency exchange	0
Employee Severance and Other Exit Costs [Member] | Poway Volume Manufacturing Transition [Member]
Accrued restructuring, balance	0
Restructuring Charges	392
Amounts paid or charged	(371)
Accrued restructuring, balance	21
Employee Severance and Other Exit Costs [Member] | 2025 Strategic Restructuring [Member]
Accrued restructuring, balance	0
Restructuring Charges	6,236
Amounts paid or charged	(2,077)
Accrued restructuring, balance	4,233
Impact of currency exchange	$ 74