Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable - Accounts Receivable (Details) - USD ($) $ in Thousands	Jun. 29, 2024	Dec. 30, 2023
Provision for credit losses	$ (1,600)	$ (1,600)
Accounts receivable, net	66,915	70,690
Billed Revenues [Member]
Accounts receivable, current	41,377	51,111
Unbilled Revenues [Member]
Accounts receivable, current	18,691	14,737
Work In Progress [Member]
Accounts receivable, current	$ 8,447	$ 6,442