Note 15 - Income Taxes (Details Textual)	6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Effective Income Tax Rate Reconciliation, Percent	41.50%	41.70%
Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Effective Income Tax Rate Reconciliation, Percent	26.50%	28.40%
Effective Income Tax Rate Reconciliation, Percent	37.30%	36.10%