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Note 14 - Segment Information (Details) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 29, 2014 | Mar. 30, 2013
Revenues |  |
Revenues | $ 48,569 | $ 41,230
United States [Member] |  |
Revenues |  |
Revenues | 35,809 | 32,583
Canada [Member] |  |
Revenues |  |
Revenues | 11,485 | 7,386
Puerto Rico [Member] |  |
Revenues |  |
Revenues | $ 1,275 | $ 1,261

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_RevenuesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration