Note 10 - Benefit Plans - Weighted Average Assumptions (Details)	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Dec. 27, 2014
United States Pension Plan of US Entity [Member]
Discount rate		3.90%	4.80%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets		6.80%	6.80%
Discount rate		3.90%	3.90%
Foreign Pension Plan [Member]
Discount rate	3.70%	3.70%	3.70%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	4.90%	5.10%	4.90%
Compensation increase rate	5.30%	5.30%	3.80%
Discount rate	2.60%	3.80%	3.70%
Compensation increase rate	4.50%	6.20%	5.30%