Consolidated Balance Sheets (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Accounts Receivable, Allowance for Credit Loss, Current		$ 492	$ 457
Preferred Stock, Shares Authorized (in shares)	1,000,000	1,000,000
Preferred Stock, No Par Value (in dollars per share)	$ 0	$ 0
Preferred Stock, Shares Issued (in shares)	0	0
Common Stock, Shares Authorized (in shares)	30,000,000	30,000,000
Common Stock, No Par Value (in dollars per share)	$ 0	$ 0
Common Stock, Shares, Outstanding, Ending Balance (in shares)	13,594,407	13,493,332
Common Stock, Shares, Issued (in shares)	13,594,407	13,493,332