Note 14 - Segment Information (Details) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jan. 03, 2015	Dec. 28, 2013
Revenues
Revenues	$ 49,310	$ 46,382	$ 49,509	$ 48,569	$ 45,849	$ 41,320	$ 42,379	$ 41,230	$ 193,770	$ 170,778
United States [Member]
Revenues
Revenues									139,880	130,589
Canada [Member]
Revenues
Revenues									47,639	34,989
Puerto Rico [Member]
Revenues
Revenues									$ 6,251	$ 5,200