Note 6 - Business Combination and Goodwill - Details of Identified Intangible Assets Acquired Through Acquisition (Details) - USD ($) $ in Millions		12 Months Ended
	Nov. 12, 2021	Jan. 01, 2022	Jan. 02, 2021
Existing Technology [Member]
Useful life (Year)		5 years 1 month 6 days
Customer Relationships [Member]
Useful life (Year)		6 years 1 month 6 days	5 years 9 months 18 days
Trademarks and Trade Names [Member]
Useful life (Year)		10 years
Mirametrix [Member]
Fair value	$ 24.8
Mirametrix [Member] | Existing Technology [Member]
Useful life (Year)	7 years
Fair value	$ 13.5
Mirametrix [Member] | Customer Relationships [Member]
Useful life (Year)	7 years
Fair value	$ 9.8
Mirametrix [Member] | Trademarks and Trade Names [Member]
Useful life (Year)	10 years
Fair value	$ 1.5