Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable - Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 30, 2023
Allowance for sales discounts and doubtful accounts	$ (1,600)	$ (1,600)
Accounts receivable, net	73,486	70,690
Billed Revenues [Member]
Accounts receivable, current	57,983	51,111
Unbilled Revenues [Member]
Accounts receivable, current	9,181	14,737
Work In Progress [Member]
Accounts receivable, current	$ 7,922	$ 6,442