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Accounts Receivable Trade, Net - Schedule of Accounts, Notes, Loans and Financing Receivable (Details) - USD ($) $ in Thousands | Dec. 28, 2018 | Dec. 29, 2017
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Accounts Receivable [Line Items] |  |  |
Total accounts receivable trade, gross |  | $ 26,496 | $ 20,384
Less allowance for doubtful accounts |  | 550 | 349
Less allowance for sales returns | [1] | 2,895 | 2,182
Total accounts receivable trade, net |  | 25,946 | 17,853
US |  |  |
Accounts Receivable [Line Items] |  |  |
Total accounts receivable trade, gross |  | 807 | 804
Foreign |  |  |
Accounts Receivable [Line Items] |  |  |
Total accounts receivable trade, gross |  | $ 25,689 | $ 19,580
[1] | For 2017, recognized in accounts receivable trade, net on the Consolidated Balance Sheets

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