Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable - Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 28, 2024	Dec. 30, 2023
Provision for credit losses	$ (1,570)	$ (1,600)
Accounts receivable, net	77,960	70,690
Billed Revenues [Member]
Accounts receivable, current	55,224	51,111
Unbilled Revenues [Member]
Accounts receivable, current	16,931	14,737
Work In Progress [Member]
Accounts receivable, current	$ 7,375	$ 6,442