Note 11 - Share Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Options outstanding (in shares)	42,000	44,500
Options outstanding, weighted average exercise price (in dollars per share)	$ 8.27	$ 8.12
Options granted (in shares)	0
Options granted, weighted average exercise price (in dollars per share)
Options exercised, net (in shares)	(11,917)	(2,500)
Options exercised, net, weighted average exercise price (in dollars per share)	$ 6	$ 5.62
Options forfeited/cancelled (in shares)	(25,000)
Options forfeited/cancelled, weighted average exercise price (in dollars per share)	$ 9.81
Options outstanding (in shares)	0	42,000
Options outstanding, weighted average exercise price (in dollars per share)		$ 8.27
Options exercisable, net (in shares)	0	27,000
Options exercisable, net, weighted average exercise price (in dollars per share)		$ 9.47
Intrinsic value of outstanding stock options	$ 0	$ 6
Intrinsic value of stock options exercised in fiscal year ended	$ 17	$ 3
Options forfeited in cashless exercises (in shares)	(5,083)
Options forfeited in cashless exercises, weighted average exercise price (in dollars per share)	$ 6.10
Weighted average grant date fair value of stock options issued during fiscal year ended (in dollars per share)	$ 0