Note 11 - Stock Option Activity (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 04, 2015	Jul. 04, 2015
Options outstanding as of January 3, 2015 (in shares)		53,000
Options outstanding as of January 3, 2015 (in dollars per share)		$ 7.65
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		0
Options exercised (in shares)		(3,500)
Options exercised (in dollars per share)		$ 4.30
Options forfeited/cancelled (in shares)		0
Options outstanding as of July 4, 2015 (in shares)	49,500	49,500
Options outstanding as of July 4, 2015 (in dollars per share)	$ 7.88	$ 7.88
Options outstanding price range at July 4, 2015 (in dollars per share)		5.27
Options outstanding price range at July 4, 2015 (in dollars per share)		9.81
Options outstanding price range at July 4, 2015 (in dollars per share)	$ 7.88	$ 7.65
Options exercisable as of July 4, 2015 (in shares)	27,000
Options exercisable as of July 4, 2015 (in dollars per share)	$ 9.47
Intrinsic value per share of outstanding stock options as of July 4, 2015	$ 1
Intrinsic value per share of stock options exercised for the thirteen week period ended July 4, 2015	$ 8