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Note 5 - Stock Options Outstanding (Details)
 9 Months Ended
Oct. 04, 2015
$ / shares
shares
Outstanding Shares (in shares) | shares 126,000
Weighted Average Exercise Price (in dollars per share) $ 9.23
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | shares 0
Granted (in dollars per share) $ 0
Exercised (in shares) | shares 38,500
Exercised (in dollars per share) $ 9.27
Forfeited or canceled (in shares) | shares 0
Forfeited or canceled (in dollars per share) $ 0
Outstanding Shares (in shares) | shares 87,500
Weighted Average Exercise Price (in dollars per share) $ 8.75
Exercisable at October 4, 2015 (in shares) | shares 87,500
Exercisable at October 4, 2015 (in dollars per share) $ 8.75