Note 10 - Stockholders' Equity - Stock Options Outstanding (Details) - $ / shares		12 Months Ended
		Jan. 01, 2017		Jan. 03, 2016	Dec. 28, 2014
Outstanding at January 3, 2016 (in shares)		87,500
Outstanding at January 3, 2016 (in dollars per share)		$ 8.75
Granted (in shares)		0		0	0
Granted (in dollars per share)		$ 0
Exercised (in shares)		0
Exercised (in dollars per share)		$ 0
Forfeited or cancelled (in shares)		0
Forfeited or cancelled (in dollars per share)		$ 0
Outstanding at January 1, 2017 (a) (in shares)		87,500	[1]	87,500
Outstanding at January 1, 2017 (a) (in dollars per share)		$ 8.75	[1]	$ 8.75
Exercisable at January 1, 2017 (b) (in shares)	[2]	87,500
Exercisable at January 1, 2017 (b) (in dollars per share)	[2]	$ 8.75

[1] At January 1, 2017, the weighted-average remaining contractual life of options outstanding was 2.9 years.

[2] At January 1, 2017, the weighted-average remaining contractual life of options exercisable was 2.9 years.