Note 14 - Segment Information (Details) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013		Jun. 28, 2014	Jun. 29, 2013
Revenues
Revenues	$ 49,509	$ 42,379	[1]	$ 98,078	$ 83,609	[1]
United States [Member]
Revenues
Revenues	34,943	32,984		70,752	65,567
Canada [Member]
Revenues
Revenues	13,097	8,063		24,582	15,449
Puerto Rico [Member]
Revenues
Revenues	$ 1,469	$ 1,332		$ 2,744	$ 2,593

[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.