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Note 5 - Fair Value Measurements and Financial Instruments (Tables)

v3.19.1
Note 5 - Fair Value Measurements and Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2018
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
      March 31,
2018
      Level 1       Level 2       Level 3  
Assets                                
                                 
High interest savings account   $
1,243
    $
-
    $
1,243
     
-
 
United Sates treasury bills    
6,985
     
-
     
6,985
     
-
 
Government of Canada treasury bills    
1,994
     
-
     
1,994
     
-
 
Guaranteed investment certificates, Royal Bank of Canada    
4,787
     
-
     
4,787
     
-
 
                                 
    $
15,009
    $
-
    $
15,009
    $
-
 
      December 31, 
2017
      Level 1       Level 2       Level 3  
                                 
Assets           $       $       $    
                                 
Canadian provincial promissory notes    
2,003
     
-
     
2,003
     
-
 
Commercial Notes    
1,999
     
-
     
1,999
     
-
 
Guaranteed income certificates, Royal Bank of Canada    
4,202
     
-
     
4,202
     
-
 
    $
8,204
    $
-
    $
8,204
    $
-