Note 11 - Stock Option Activity (Details)	3 Months Ended
	Apr. 02, 2016 $ / shares shares
Options outstanding (in shares) | shares	44,500
Options outstanding, weighted average exercise price (in dollars per share)	$ 8.12
Options granted, weighted average exercise price (in dollars per share)	0
Options exercised, weighted average exercise price (in dollars per share)	0
Options forfeited/cancelled, weighted average exercise price (in dollars per share)	$ 0
Options outstanding (in shares) | shares	44,500
Options outstanding, weighted average exercise price (in dollars per share)	$ 8.12
Options outstanding price range (in dollars per share)	5.27
Options outstanding price range (in dollars per share)	$ 9.81
Options exercisable (in shares) | shares	29,500
Options exercisable, weighted average exercise price (in dollars per share)	$ 9.15
Intrinsic value per share of outstanding stock options (in dollars per share)	$ 0