Note 9 - Income Taxes - Reconciliation of the U.S. Statutory Rate to the Effective Rate (Details)	6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014
Income tax expense at statutory rates	35.00%	35.00%
Increase (decrease) in income taxes resulting from:
State income taxes, net of federal benefit	4.50%	4.50%
Federal employment tax credits	(7.10%)	(7.90%)
Other	(0.10%)	1.00%
Effective tax rate	32.30%	32.60%