Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Feb. 26, 2023	Dec. 27, 2022	Feb. 27, 2022
Accounts receivable, allowance for doubtful accounts	$ 120		$ 104
Preferred stock, par value (in dollars per share)	$ 1		$ 1
Preferred stock, shares authorized (in shares)	500,000		500,000
Preferred Stock, Shares Issued (in shares)	0	0
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.10		$ 0.10
Common Stock, Shares Authorized (in shares)			60,000,000
Common Stock, Shares, Issued (in shares)	20,965,144		20,965,144
Treasury Stock, Common, Shares (in shares)	493,934		506,934
Treasury Stock, Common, Shares (in shares)	493,934		506,934