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Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable - Accounts Receivable (Details) - USD ($) $ in Thousands | Apr. 03, 2021 | Jan. 02, 2021
--- | --- | ---
Allowance for sales discounts and doubtful accounts | $ (1,418) | $ (1,750)
Accounts receivable, net | 45,282 | 36,007
Billed Revenues [Member] |  |
Accounts receivable, current | 31,529 | 25,926
Unbilled Revenues [Member] |  |
Accounts receivable, current | 11,636 | 8,219
Work In Progress [Member] |  |
Accounts receivable, current | $ 3,535 | $ 3,612

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