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Note 6 - Acquisitions (Detail) - Maximum Deferred Consideratoin Payments (USD $) In Thousands, unless otherwise specified | Dec. 31, 2016 | Jan. 02, 2016 | Jan. 03, 2015 | Dec. 28, 2013 | Dec. 29, 2012
--- | --- | --- | --- | --- | ---
Estimated contingent consideration payments | $ 307 | $ 269 | $ 253 | $ 320 | $ 1,149
PSG [Member] |  |  |  |  |
Estimated contingent consideration payments |  |  |  | 92 | 92
BGA [Member] |  |  |  |  |
Estimated contingent consideration payments | $ 307 | $ 269 | $ 253 | $ 228 | $ 1,057

X
- Definition Amount of potential cash payments that could result from the contingent consideration arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_BusinessAcquisitionContingentConsiderationPotentialCashPayment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant