Quarterly report pursuant to Section 13 or 15(d)

8. Trade and other receivables (Details Narrative)

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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%