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Goodwill and intangible assets
12 Months Ended
Dec. 28, 2013
Goodwill And Intangible Assets Disclosure [Abstract]  
Goodwill Disclosure [Text Block]

9. Goodwill and Intangible Assets

    December 28, 2013December 29, 2012
    $$
Goodwill 53,673 57,414
Intangible assets with a finite life at cost, less accumulated  
 amortization of $29,033 (December 29, 2012 - $24,300) 47,991 52,885
      
The following is a summary of changes in goodwill:
      
     $
Balance at December 31, 2011 49,387
 Acquisitions during the year 7,892
 Impact of foreign exchange and other 135
Balance at December 29, 2012 57,414
 Goodwill impairment (3,552)
 Impact of foreign exchange and other (189)
Balance at December 28, 2013 53,673

Opta Minerals performed its annual impairment test for goodwill as at September 30, 2013, and recognized a non-cash goodwill impairment loss of $ 3,552 related to one of its reporting units in the third quarter of 2013. Due to increased competition and reduced demand for industrial minerals in markets along the U.S. east coast, the operating profits and cash flows of the reporting unit were lower than expected in the fourth quarter of 2012 and first three quarters of 2013, reflecting reduced sales volumes, price concessions causing lower gross margins, and lower utilization of plant capacity. The fair value of the reporting unit was estimated based on the expected present value of future cash flows using unobservable (level 3) inputs, which included the following assumptions: (i) an estimated cumulative average operating income growth rate from 2014 to 2017 of 25.7%; (ii) a projected long-term annual operating income growth rate of 2.5%; and (iii) a risk-adjusted discount rate of 14.0%. The goodwill associated with the reporting unit was fully deductible for tax purposes. There was no indication of goodwill impairment related to the other reporting units of Opta Minerals based on the testing done as at September 30, 2013. As at November 30, 2013, Opta Minerals identified certain additional impairment indicators upon approval of its budget for fiscal 2014, which resulted in additional impairment tests being performed. These tests did not, however, result in any additional goodwill impairment losses. Given the timing of the budget approval process, Opta Minerals will now perform its annual impairment tests as at November 30.

The Company performed its annual test for goodwill impairment related to the reporting units of SunOpta Foods as of the beginning of the fourth quarter. Based on the quantitative testing performed as at September 29, 2013 (the first day of the fourth quarter), the Company determined that none of the goodwill associated with the SunOpta Foods reporting units was impaired.

There was no indication of goodwill impairment associated with the reporting units of either SunOpta Foods or Opta Minerals based on the testing done for the years ended December 29, 2012 and December 31, 2011.

The following is a summary of changes in intangible assets:
        
    Customer and otherPatents and  
    relationshipstrademarksOtherTotal
    $$$$
Balance at December 31, 2011 45,369 546 2,120 48,035
 Acquisitions (see note 2) 9,347 - - 9,347
 Additions - - 128 128
 Amortization (4,163) (101) (669) (4,933)
 Impact of foreign exchange 295 - 13 308
Balance at December 29, 2012 50,848 445 1,592 52,885
 Additions - 12 170 182
 Impairment (see note 13) (310) - - (310)
 Amortization (4,206) (91) (436) (4,733)
 Impact of foreign exchange 246 - (279) (33)
Balance at December 28, 2013 46,578 366 1,047 47,991

The Company estimates that the aggregate future amortization expense associated with finite-life intangible assets in each of the next five fiscal years and thereafter will be as follows:

     $
2014  4,718
2015  4,551
2016  4,359
2017  4,359
2018  4,324
Thereafter  25,680
   47,991