Note 2 - Restructuring and Other Charges (Details) - Liability Balance Related to Restructuring (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended			12 Months Ended
	Sep. 27, 2014	Sep. 27, 2014	Sep. 27, 2013	Sep. 28, 2013	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Balance		$ 245	$ 395	$ 395	$ 395
Restructuring expense	105	5,965	1,915	1,915
Payments		(3,061)			(2,065)
Balance	1,018	1,018			245
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 1,696	$ 3,834			$ 1,915