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Note 11 - Stock Option Activity (Details) - USD ($)
 12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Options outstanding (in shares) 53,000 276,900
Options outstanding (in dollars per share) $ 7.65 $ 5.47
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 0 15,000
Options granted (in dollars per share) $ 0 $ 6.10
Options exercised, net (in shares) (3,500) (185,836)
Options exercised, net (in dollars per share) $ 4.30 $ 4.84
Options forfeited in cashless exercises (in shares)   (42,064)
Options forfeited in cashless exercises (in dollars per share)   $ 4.84
Options forfeited/cancelled, shares (in shares) (5,000) (11,000)
Options forfeited/cancelled (in dollars per share) $ 5.78 $ 8.81
Options outstanding (in shares) 44,500 53,000
Options outstanding (in dollars per share) $ 8.12 $ 7.65
Options exercisable (in shares) 29,500 30,500
Options exercisable (in dollars per share) $ 9.15 $ 8.88
Intrinsic value of outstanding stock options $ 0 $ 33,000
Intrinsic value of stock options exercised in fiscal year $ 8,000 $ 640,000
Weighted average grant date fair value of stock options issued during fiscal year (in dollars per share) $ 5 $ 2.33