Note 11 - Share Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Options outstanding, shares (in shares)	44,500	53,000
Options outstanding, weighted average exercise price (in dollars per share)	$ 8.12	$ 7.65
Options granted, shares (in shares)
Options granted, weighted average exercise price (in dollars per share)
Options exercised, net, shares (in shares)	(2,500)	(3,500)
Options exercised, net, weighted average exercise price (in dollars per share)	$ 5.62	$ 4.30
Options forfeited/cancelled, shares (in shares)		(5,000)
Options forfeited/cancelled, weighted average exercise price (in dollars per share)		$ 5.78
Options outstanding, shares (in shares)	42,000	44,500
Options outstanding, weighted average exercise price (in dollars per share)	$ 8.27	$ 8.12
Options exercisable, net, shares (in shares)	27,000	29,500
Options exercisable, net, weighted average exercise price (in dollars per share)	$ 9.47	$ 9.15
Intrinsic value of outstanding stock options, shares	$ 6	$ 0
Intrinsic value of stock options exercised in fiscal year ended, shares	$ 3	$ 8