CONSOLIDATED CONDENSED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Accounts receivable, allowance for credit	$ 474	$ 440
Common Class A
Common stock, par value (in dollars per share)	$ 3	$ 3
Common stock, shares authorized (in shares)	80,000,000	80,000,000
Common stock, shares issued (in shares)	14,640,554	14,409,281
Common stock, shares outstanding (in shares)	14,640,554	14,409,281
Common Class B
Common stock, par value (in dollars per share)	$ 3	$ 3
Common stock, shares authorized (in shares)	16,000,000	16,000,000
Common stock, shares issued (in shares)	1,249,302	1,121,129
Common stock, shares outstanding (in shares)	1,249,302	1,121,129