Note 2 - Restructuring and Other Charges (Details) (USD $)	3 Months Ended		9 Months Ended					3 Months Ended		9 Months Ended	12 Months Ended	3 Months Ended
	Sep. 27, 2014	Jun. 28, 2014	Sep. 27, 2014	Sep. 27, 2013	Sep. 28, 2013	Dec. 31, 2013	Dec. 31, 2012	Sep. 27, 2014 Assets Held-for-sale [Member]	Sep. 27, 2014 Employee Severance [Member]	Sep. 27, 2014 Employee Severance [Member]	Dec. 31, 2013 Employee Severance [Member]	Jun. 28, 2014 Asset Write-downs [Member]
Note 2 - Restructuring and Other Charges (Details) [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	50		150	25
Restructuring Charges	$ 105,000		$ 5,965,000	$ 1,915,000	$ 1,915,000				$ 1,696,000	$ 3,834,000	$ 1,915,000	$ 3,722,000
Restructuring Reserve	1,018,000		1,018,000			245,000	395,000
Proceeds from Sale of Property, Plant, and Equipment								1,850
Gain (Loss) on Disposition of Property Plant Equipment			(2,044,000)		175,000			1,591
Assets Held for Sale	3,251,000		3,251,000
Inventory Write-down		$ 2,080,000