Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable - Accounts Receivable (Details) - USD ($) $ in Thousands	Jan. 01, 2022	Jan. 02, 2021
Allowance for sales discounts and doubtful accounts	$ (1,197)	$ (1,750)
Accounts receivable, net	48,240	36,007
Billed Revenues [Member]
Accounts receivable, current	37,396	25,926
Unbilled Revenues [Member]
Accounts receivable, current	10,231	8,219
Work In Progress [Member]
Accounts receivable, current	$ 1,810	$ 3,612

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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