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

Note 8 - Financial Instruments (Details Textual)

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Note 8 - Financial Instruments (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement Line Items [Line Items]        
Proceeds from issuing shares   $ 13,394 $ 5,726 $ 8
Value at risk   51    
Forward contract [member]        
Statement Line Items [Line Items]        
Financial instruments designated as hedging instruments, at fair value   0    
Floating interest rate [member]        
Statement Line Items [Line Items]        
Total financial liabilities   $ 0    
Major ordinary share transactions [member]        
Statement Line Items [Line Items]        
Proceeds from issuing shares $ 8,900