Note 10 - Employee Benefit Plans - Plan Asset Mix (Details)	Oct. 03, 2015
Large Cap Equities [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	37.60%
Mid Cap Equities [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	7.70%
Small Cap Equities [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	8.20%
International Equities [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	8.80%
Fixed Income Investments [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	37.30%
Cash and Cash Equivalents [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	0.40%