Note 10 - Shareholders' Equity (Details) - Stock Options Outstanding - $ / shares		12 Months Ended
		Jan. 03, 2016		Dec. 28, 2014	Dec. 29, 2013
Stock Options Outstanding [Abstract]
Shares		126,000
Weighted average exercise price		$ 9.23
Exercisable at January 3, 2016 (b)	[1]	87,500
Exercisable at January 3, 2016 (b)	[1]	$ 8.75
Granted		0		2,014	0
Granted		$ 0
Exercised		38,500
Exercised		$ 9.27
Forfeited or cancelled		0
Forfeited or cancelled		$ 0
Shares		87,500	[2]	126,000
Weighted average exercise price		$ 8.75	[2]	$ 9.23

[1] At January 3, 2016, the weighted-average remaining contractual life of options exercisable was 3.9 years.

[2] At January 3, 2016, the weighted-average remaining contractual life of options outstanding was 3.9 years.