Annual report pursuant to Section 13 and 15(d)

Income Tax - Summary of Investment Tax Credits and Non-Capital Losses and Net Operating Losses (Detail)

v2.4.0.8
Income Tax - Summary of Investment Tax Credits and Non-Capital Losses and Net Operating Losses (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses $ 150,255 $ 141,500
Non-capital Losses 80,934 58,300
2012 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 44  
Non-capital Losses     
2013 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses     
Non-capital Losses     
2014 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses     
Non-capital Losses     
2015 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses     
Non-capital Losses 1,707  
2016 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses     
Non-capital Losses     
2017 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses     
Non-capital Losses     
2018 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 10,795  
Non-capital Losses     
2019 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 32  
Non-capital Losses     
2020 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 2,745  
Non-capital Losses     
2021 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 400  
Non-capital Losses     
2022 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 11,766  
Non-capital Losses     
2023 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 10,785  
Non-capital Losses     
2024 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 16,814  
Non-capital Losses     
2025 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 2,062  
Non-capital Losses     
2026 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 27,157  
Non-capital Losses 7,407  
2027 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 22,225  
Non-capital Losses 4,982  
2028 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 12,648  
Non-capital Losses 8,059  
2029 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 4,358  
Non-capital Losses     
2030 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 5,034  
Non-capital Losses 6,125  
2031 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 6,200  
Non-capital Losses 12,121  
2032 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 8,418  
Non-capital Losses 17,278  
2033 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Net Operating Losses 8,772  
Non-capital Losses 23,255  
Investment tax credits carryforwards [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 4,020 2,000
Investment tax credits carryforwards [Member] | 2012 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits     
Investment tax credits carryforwards [Member] | 2013 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits     
Investment tax credits carryforwards [Member] | 2014 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits     
Investment tax credits carryforwards [Member] | 2015 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits     
Investment tax credits carryforwards [Member] | 2016 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits     
Investment tax credits carryforwards [Member] | 2017 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits     
Investment tax credits carryforwards [Member] | 2018 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 150  
Investment tax credits carryforwards [Member] | 2019 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 102  
Investment tax credits carryforwards [Member] | 2020 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 76  
Investment tax credits carryforwards [Member] | 2021 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 69  
Investment tax credits carryforwards [Member] | 2022 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 105  
Investment tax credits carryforwards [Member] | 2023 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 96  
Investment tax credits carryforwards [Member] | 2024 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 111  
Investment tax credits carryforwards [Member] | 2025 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 144  
Investment tax credits carryforwards [Member] | 2026 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 400  
Investment tax credits carryforwards [Member] | 2027 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 173  
Investment tax credits carryforwards [Member] | 2028 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 390  
Investment tax credits carryforwards [Member] | 2029 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 317  
Investment tax credits carryforwards [Member] | 2030 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 346  
Investment tax credits carryforwards [Member] | 2031 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 608  
Investment tax credits carryforwards [Member] | 2032 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits 505  
Investment tax credits carryforwards [Member] | 2033 [Member]
    
Schedule Of Tax Credits And Losses Carry Forward Expiration [Line Items]    
Investment tax credits $ 428