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Note 11 - Preferred Shares (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Stockholders Equity [Table Text Block]
      Number of Shares       Preferred Shares Amount       Dividends paid-in-kind       Total  
Balance,
January 1, 2019
   
19,605
     
14,500,000
     
4,257,361
     
18,757,361
 
Dividends declared    
81
     
-
     
78,639
     
78,639
 
Redemption of preferred shares    
(11,686
)    
(8,155,055
)    
(3,530,945)
     
(11,686,000
)
Preferred deemed dividend    
-
     
-
     
504,577
     
504,577
 
Balance,
June 30, 2019
   
8,000
     
6,344,945
     
1,309,632
     
7,654,577