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

Note 4 - Capital Disclosures (Details Textual)

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Note 4 - Capital Disclosures (Details Textual)
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Oct. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2014
USD ($)
Statement Line Items [Line Items]          
Authorised capital commitments but not contracted for         $ 100,000,000
Total cash   $ 3,225,000   $ 2,942,000  
Total cash equivalents   $ 7,406,000   $ 4,998,000  
Investments, Interest Rate   1.45%      
Number of investments       0  
Potential ordinary share transactions [member]          
Statement Line Items [Line Items]          
Authorised capital commitments but not contracted for $ 100,000,000        
Aspire purchase agreement [member]          
Statement Line Items [Line Items]          
Authorised capital commitments but not contracted for     $ 15,500,000