Note 12 - Benefit Plans (Details) - Weighted Average Assumptions	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Note 12 - Benefit Plans (Details) - Weighted Average Assumptions [Line Items]
Expected return on plan assets	6.80%
United States Pension Plan of US Entity [Member]
Note 12 - Benefit Plans (Details) - Weighted Average Assumptions [Line Items]
Discount rate	4.80%	3.90%	5.40%
Expected return on plan assets	6.80%	6.80%	7.80%
Measurement dates	12/31/14	12/31/13	12/31/12
Discount rate	3.90%	4.80%	3.90%
Foreign Pension Plan [Member]
Note 12 - Benefit Plans (Details) - Weighted Average Assumptions [Line Items]
Discount rate	3.70%	4.50%	5.50%
Expected return on plan assets	4.90%	4.80%	4.50%
Compensation increase rate	3.80%	3.60%	5.60%
Measurement dates	12/31/14	12/31/13	12/31/12
Discount rate	3.70%	4.50%	4.20%
Compensation increase rate	5.30%	3.80%	6.30%