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

Note 8 - Financial Instruments - Currency Risk (Details)

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Note 8 - Financial Instruments - Currency Risk (Details) - Currency risk [member] - CAD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement Line Items [Line Items]      
Balance, end of year $ 699 $ 2,592 $ 11,845
Cash and cash equivalents [member]      
Statement Line Items [Line Items]      
Financial assets 83 2,867 4,579
Invesmtents [member]      
Statement Line Items [Line Items]      
Financial assets 1,000 8,245
Accounts payable and accrued liabilities [member]      
Statement Line Items [Line Items]      
Accounts payable and accrued liabilities $ (384) $ (275) $ (979)