v2.4.0.8
Accounts receivable (Tables)
12 Months Ended
Dec. 28, 2013
Receivables [Abstract]  
Schedule Of Accounts Notes Loans And Financing Receivable [Table Text Block]
    December 28, 2013December 29, 2012
    $$
Trade receivables 111,593 115,737
Allowance for doubtful accounts (1,676) (2,423)
     109,917 113,314

    December 28, 2013December 29, 2012
    $$
Balance, beginning of year 2,423 1,596
Net additions to provision 1,247 1,639
Accounts receivable written off, net of recoveries (1,996) (844)
Effects of foreign exchange rate differences 2 32
Balance, end of year 1,676 2,423