Note 11 - Shareholders' Equity - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Jan. 02, 2016	Dec. 27, 2014
Balance	[1]	$ (11,983)	$ (8,722)	$ (29,615)
Balance		10,769	11,584	10,791
Balance		(73,365)	(48,533)	(2,302)
Balance		(74,579)	(45,671)	(21,126)
Activity during period	[1]	(3,261)	20,893
Activity during period		(815)	793	1,398
Activity during period		(24,832)	(46,231)	$ (30,466)
Activity during period		$ (28,908)	$ (24,545)

[1] Net of tax of $1.1 million, $0.7 million, and $1.3 million for 2016, 2015, and 2014, respectively.