Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares shares in Thousands	Mar. 26, 2022	Dec. 25, 2021	[1]
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	1,000	1,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	60,000	60,000
Common stock, shares issued (in shares)	49,025	48,756
Common stock, shares outstanding (in shares)	49,025	48,756
Treasury stock, shares (in shares)	420	207

[1] Derived from December 25, 2021 audited financial statements