Note 3 - Revenue Recognition (Details Textual) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2026 USD ($)	Jun. 28, 2025 USD ($)	Jul. 04, 2026 USD ($)	Jun. 28, 2025 USD ($)	Jan. 03, 2026 USD ($)
Contract with Customer, Liability	$ 8.2		$ 8.2		$ 14.8
Contract With Customer, Liability, Revenue Recognized, Including Opening Balance	$ 5.2	$ 1.1	$ 11.6	$ 4.2
Revenue Benchmark [Member] \| Customer Concentration Risk [Member]
Number of Major Customers			3	2
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Specialty Health Care [Member]
Number of Major Customers			2
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Specialty Health Care [Member] \| Customer 1 [Member]
Concentration Risk, Percentage			23.30%	22.50%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Specialty Health Care [Member] \| Customer 2 [Member]
Concentration Risk, Percentage			13.30%	13.10%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Engineering Services [Member]
Number of Major Customers			1
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Engineering Services [Member] \| Customer 1 [Member]
Concentration Risk, Percentage			13.50%