Annual reports filed by certain Canadian issuers pursuant to Section 15(d) and Rule 15d-4

Acquired intellectual property and other intangible assets - (Details)

v3.19.1
Acquired intellectual property and other intangible assets - (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
year
Dec. 31, 2017
USD ($)
Changes in intangible assets other than goodwill [abstract]    
Opening net book value $ 14,116 $ 15,550
Additions 45  
Amortization for the year (1,545) (1,434)
Closing net book value $ 12,616 14,116
Estimated useful lives or amortisation rates, intangible assets other than goodwill | year 9.59  
Cost    
Changes in intangible assets other than goodwill [abstract]    
Opening net book value $ 21,246  
Closing net book value 20,626 21,246
Accumulated impairment    
Changes in intangible assets other than goodwill [abstract]    
Opening net book value (7,130)  
Closing net book value (8,010) (7,130)
Patents    
Changes in intangible assets other than goodwill [abstract]    
Opening net book value 773 922
Additions 45  
Amortization for the year (260) (149)
Closing net book value 558 773
Patents | Cost    
Changes in intangible assets other than goodwill [abstract]    
Opening net book value 2,171  
Closing net book value 1,551 2,171
Patents | Accumulated impairment    
Changes in intangible assets other than goodwill [abstract]    
Opening net book value (1,398)  
Closing net book value (993) (1,398)
Acquired intellectual property and reacquired rights    
Changes in intangible assets other than goodwill [abstract]    
Opening net book value 13,343 14,628
Additions 0  
Amortization for the year (1,285) (1,285)
Closing net book value 12,058 13,343
Acquired intellectual property and reacquired rights | Cost    
Changes in intangible assets other than goodwill [abstract]    
Opening net book value 19,075  
Closing net book value 19,075 19,075
Acquired intellectual property and reacquired rights | Accumulated impairment    
Changes in intangible assets other than goodwill [abstract]    
Opening net book value (5,732)  
Closing net book value $ (7,017) $ (5,732)