Note 2 - Restructuring and Other Charges (Details Textual) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	May. 31, 2015	Jul. 04, 2015 USD ($)	Jun. 28, 2014 USD ($)	Jul. 04, 2015 USD ($)	Jun. 28, 2014 USD ($)	Dec. 31, 2014 USD ($)
Employee Severance [Member]
Restructuring Charges		$ 611	$ 687	$ 611	$ 2,138	$ 4,199
Asset Write Downs [Member]
Restructuring Charges			$ 3,722
Restructuring and Related Cost, Number of Positions Eliminated	25		60		100	150
Restructuring Charges		561	$ 4,409	561	$ 5,860	$ 4,199
Gain (Loss) on Disposition of Property Plant Equipment		$ 50		$ 6	$ (3,705)
Inventory Write-down			$ 2,080