Note 2 - Liability Balance Related to Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jul. 04, 2015	Jul. 04, 2015	Dec. 31, 2014
Workforce Related [Member]
Balance	$ 330	$ 330	$ 745
Restructuring expense		611	4,002
Payments		(1,026)	(3,502)
Lease Related [Member]
Balance	80	$ 80	159
Restructuring expense			197
Payments		$ (79)	(38)
Employee Severance [Member]
Restructuring expense	611	611	4,199
Balance	410	410	904
Restructuring expense	$ 561	561	4,199
Payments		$ (1,105)	$ (3,540)