Note 9 - Pensions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Dec. 27, 2014
Note 9 - Pensions (Details) [Line Items]
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities (in Dollars)	11,768		$ 11,768
United States Pension Plan of US Entity [Member]
Note 9 - Pensions (Details) [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	3.90%	6.75%
Foreign Pension Plan [Member]
Note 9 - Pensions (Details) [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	5.39%	5.14%