Consolidated Statements of Stockholders' Equity (Parentheticals) - shares	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Statement of Stockholders' Equity [Abstract]
Exercised	0	29,001	39,711
Common Stock, shares issued under Directors' Stock Plan	0	0	0
Common Stock, shares purchased	555,875	511,353	20,226
Restricted Stock, shares issued	131,867	0	307,292
Restricted Stock, shares forfeited	0	17,784	106,196
Class B Common Stock converted into Class A Common Stock, shares	0	2,635	6,250