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Note 18 - Revenues (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Disaggregation of Revenue [Table Text Block]
  

2018

  

2019

  

2020

 

Time charter revenues

  39,442   61,695   60,222 

Time charter revenues from related parties

  1,606   1,311   - 

Voyage charter revenue

  -   3,082   - 

Total

  41,048   66,088   60,222