Note 15 - Employee Benefit Plans (Details) - Weighted Average Asset Allocations	12 Months Ended
	Jan. 03, 2016	Dec. 28, 2014
Asset Category:
Target allocation	100.00%
Percentage of plan assets at year end	100.00%	100.00%
Equity Securities [Member]
Asset Category:
Percentage of plan assets at year end	49.00%	63.00%
Debt Securities [Member]
Asset Category:
Percentage of plan assets at year end	41.00%	34.00%
Other Securities [Member]
Asset Category:
Percentage of plan assets at year end	10.00%	3.00%
Minimum [Member] | Equity Securities [Member]
Asset Category:
Target allocation	45.00%
Minimum [Member] | Debt Securities [Member]
Asset Category:
Target allocation	35.00%
Minimum [Member] | Other Securities [Member]
Asset Category:
Target allocation	0.00%
Maximum [Member] | Equity Securities [Member]
Asset Category:
Target allocation	55.00%
Maximum [Member] | Debt Securities [Member]
Asset Category:
Target allocation	45.00%
Maximum [Member] | Other Securities [Member]
Asset Category:
Target allocation	10.00%