Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Mar. 28, 2020	Dec. 28, 2019
Preferred stock par value (in dollars per share)	$ 1	$ 1
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.05	$ 0.05
Common stock, authorized (in shares)	40,000,000	40,000,000
Common stock, issued (in shares)	15,944,142	15,826,891
Common stock, outstanding (in shares)	13,120,970	13,003,719
Treasury stock, shares (in shares)	2,823,172	2,823,172