Note 12 - Financial Instruments and Fair Value Disclosures (Tables)
 12 Months Ended
Dec. 31, 2021
Statement Line Items [Line Items]  
Disclosure of fair value measurement of assets [text block]
  

As at December 31, 2021

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 

Cash

 $56,748  $-  $-  $56,748 

Investments (Note 5)(1)

  1,179   -   -   1,179 
  $57,927  $-  $-  $57,927 
  

As at December 31, 2020

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 

Cash

 $94,008  $-  $-  $94,008 

Investments (Note 5)(1)

  11,951   -   -   11,951 
  $105,959  $-  $-  $105,959