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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