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8. Trade and other receivables (Details Narrative) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 29, 2018 | Sep. 30, 2017 | Sep. 29, 2018 | Sep. 30, 2017 | Dec. 30, 2017
Sales Revenue, Net [Member] | Two Customers [Member] |  |  |  |  |
Concentration percentage | 10.00% |  | 10.00% |  |
Sales Revenue, Net [Member] | One Customer [Member] |  |  |  |  |
Concentration percentage |  | 10.00% |  | 10.00% |
Trade Receivables [Member] | Two Customers [Member] |  |  |  |  |
Concentration percentage |  |  | 27.00% |  |
Trade Receivables [Member] | One Customer [Member] |  |  |  |  |
Concentration percentage |  |  |  |  | 11.00%

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