Note 9 - Restructuring - Activity Related to Restructuring Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Restructuring charges	$ 2,551	$ 940	$ 3,937
Employee Severance [Member]
Accrued Restructuring	251	246	160
Restructuring charges	303	250	1,669
Costs paid or otherwise settled	(154)	(245)	(1,583)
Accrued Restructuring	400	251	246
Lease Termination and Fixed Assets [Member]
Accrued Restructuring	7,130	8,233	6,585
Restructuring charges	1,608	690	1,896
Costs paid or otherwise settled	(2,846)	(1,793)	(248)
Accrued Restructuring	5,892	7,130	8,233
Software Contracts and Engineering Tools [Member]
Accrued Restructuring	0	664	865
Restructuring charges	640	0	372
Costs paid or otherwise settled	0	(664)	(573)
Accrued Restructuring	640	0	664
Other Restructuring [Member]
Accrued Restructuring	7,381	9,143	7,610
Restructuring charges	2,551	940	3,937
Costs paid or otherwise settled	(3,000)	(2,702)	(2,404)
Accrued Restructuring	$ 6,932	$ 7,381	$ 9,143