Note 14 - Segment Information (Details) - Total Assets by Geographic Area (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Dec. 28, 2013	Sep. 28, 2013
Total assets
Total Assets	$ 94,340	$ 86,524	$ 89,956	[1]
United States [Member]
Total assets
Total Assets	63,225	62,198
Canada [Member]
Total assets
Total Assets	29,502	22,993
Puerto Rico [Member]
Total assets
Total Assets	$ 1,613	$ 1,333

[1] Certain prior year amounts have been reclassified to conform to fiscal 2014 presentation. These changes had no impact on previously reported results of operations or shareholder's equity.