Note 15 - Income Taxes - Income Tax Provision Reconciliation (Details)	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Tax at statutory rate	34.00%	34.00%
State and Puerto Rico income taxes, net of Federal income tax benefit	8.00%	5.40%
Permanent differences	5.70%	2.20%
Foreign income tax rate	0.50%
Tax loss on sale of business unit		(26.90%)
Other, net	(1.40%)	1.20%
Total income tax expense	46.80%	15.90%