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Note 30 - Share-based Payments - Option Activity (Details)
 12 Months Ended
Feb. 27, 2018
Dec. 31, 2020
$ / shares
Dec. 31, 2020
USD ($)
$ / shares
Dec. 31, 2019
$ / shares
Dec. 31, 2019
USD ($)
Statement Line Items [Line Items]          
Number of options outstanding and exercisable     38,000   38,000
Weighted average exercise price, options outstanding and exercisable | $     $ 9.48   $ 9.48
Number of options granted 10,000    
Weighted average exercise price, granted (in CAD per share)      
Number of options exercised     (5,000)  
Weighted average exercise price, exercised (in CAD per share)   $ 8.10    
Number of options expired     (5,000)    
Weighted average exercise price, expired (in dollars per share)     $ 4    
Number of options outstanding and exercisable     28,000   38,000
Weighted average exercise price, options outstanding and exercisable | $     $ 10.71   $ 9.48