Note 8 - Income Taxes Unrecognized Tax Benefits (Details) - USD ($)	9 Months Ended
Sep. 27, 2015	Sep. 28, 2014
Note 9 - Income Taxes Unrecognized Tax Benefits Details
Unrecognized tax benefits - beginning	$ 7,296,000	$ 7,296,000
Settlements of examinations	(7,296,000)	0
Unrecognized tax benefits - ending	$ 0	$ 7,296,000

Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

Name:	us-gaap_UnrecognizedTaxBenefits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant