Note 11 - Stock Option Activity (Details) - USD ($)	6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015
Options outstanding as of January 2, 2016 (in shares)	44,500
Options outstanding as of January 2, 2016 (in dollars per share)	$ 8.12
Options granted (in shares)	0	0
Options granted (in dollars per share)	$ 0
Options exercised (in shares)
Options exercised (in dollars per share)	$ 0
Options forfeited/cancelled (in shares)
Options forfeited/cancelled (in dollars per share)	$ 0
Options outstanding as of July 2, 2016 (in shares)	44,500
Options outstanding as of July 2, 2016 (in dollars per share)	$ 8.12
Options outstanding price range at July 2, 2016 (in dollars per share)	$ 9.81
Options exercisable as of July 2, 2016 (in shares)	29,500
Options exercisable as of July 2, 2016 (in dollars per share)	$ 9.15
Intrinsic value per share of outstanding stock options as of July 2, 2016