Note 7 - Reconciliation of Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Balance at beginning of year	$ 10,841	$ 10,483	$ 6,080
Gross additions for tax positions of current year	215	761	933
Gross additions for tax positions of prior years	248	365	$ 3,700
Reductions due to lapse of the statute of limitations	(243)	(587)
Foreign exchange rate impact	(617)	(181)	$ (230)
Balance at end of year	$ 10,444	$ 10,841	$ 10,483

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

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Amount of decrease in unrecognized tax benefits resulting from foreign currency translation.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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