XML 130 R71.htm IDEA: XBRL DOCUMENT v3.19.1
Goodwill and intangible assets (Details)
 3 Months Ended 12 Months Ended
Dec. 31, 2017
CAD ($)
Sep. 30, 2017
CAD ($)
Sep. 30, 2017
USD ($)
Dec. 31, 2018
CAD ($)
Dec. 31, 2017
CAD ($)
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       $ 70,012,000  
Intangible assets, end of year $ 70,012,000     65,602,000 $ 70,012,000
Cost [Member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       350,996,000 366,753,000
Effect of movements in exchange rates       9,559,000 (15,757,000)
Intangible assets, end of year 350,996,000     360,555,000 350,996,000
Accumulated amortization [member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       280,984,000 163,443,000
Amortization charge       4,799,000 6,723,000
Impairment charge       0 118,549,000
Effect of movements in exchange rates       9,170,000 (7,731,000)
Intangible assets, end of year 280,984,000     294,953,000 280,984,000
Goodwill [Member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       0  
Intangible assets, end of year 0     0 0
Goodwill [Member] | Nukem [Member]          
Reconciliation of carrying amount [Line Items]          
Impairment charge   $ 111,399,000 $ 88,377,000    
Goodwill [Member] | Cost [Member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       111,399,000 118,664,000
Effect of movements in exchange rates       0 (7,265,000)
Intangible assets, end of year 111,399,000     111,399,000 111,399,000
Goodwill [Member] | Accumulated amortization [member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       111,399,000 0
Amortization charge       0 0
Impairment charge       0 111,399,000
Effect of movements in exchange rates       0 0
Intangible assets, end of year 111,399,000     111,399,000 111,399,000
Contracts [member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       4,873,000  
Intangible assets, end of year 4,873,000     3,937,000 4,873,000
Contracts [member] | Cost [Member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       109,812,000 117,533,000
Effect of movements in exchange rates       9,559,000 (7,721,000)
Intangible assets, end of year 109,812,000     119,371,000 109,812,000
Contracts [member] | Accumulated amortization [member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       104,939,000 110,284,000
Amortization charge       1,325,000 2,002,000
Impairment charge       0 0
Effect of movements in exchange rates       9,170,000 (7,347,000)
Intangible assets, end of year 104,939,000     115,434,000 104,939,000
Intellectual Property [member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       65,139,000  
Intangible assets, end of year 65,139,000     61,665,000 65,139,000
Intellectual Property [member] | Cost [Member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       118,819,000 118,819,000
Effect of movements in exchange rates       0 0
Intangible assets, end of year 118,819,000     118,819,000 118,819,000
Intellectual Property [member] | Accumulated amortization [member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       53,680,000 49,589,000
Amortization charge       3,474,000 4,091,000
Impairment charge       0 0
Effect of movements in exchange rates       0 0
Intangible assets, end of year 53,680,000     57,154,000 53,680,000
Patents [member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       0  
Intangible assets, end of year 0     0 0
Patents [member] | UFP Investments LLC [Member]          
Reconciliation of carrying amount [Line Items]          
Impairment charge 7,150,000        
Patents [member] | Cost [Member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       10,966,000 11,737,000
Effect of movements in exchange rates       0 (771,000)
Intangible assets, end of year 10,966,000     10,966,000 10,966,000
Patents [member] | Accumulated amortization [member]          
Reconciliation of carrying amount [Line Items]          
Intangible assets, beginning of year       10,966,000 3,570,000
Amortization charge       0 630,000
Impairment charge       0 7,150,000
Effect of movements in exchange rates       0 (384,000)
Intangible assets, end of year $ 10,966,000     $ 10,966,000 $ 10,966,000