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Unearned Revenue / Accrued revenue (Tables)
12 Months Ended
Dec. 31, 2019
Deferred Received In Advance And Unearned Revenue  
Unearned Revenue And Cash Received In Advance Total Unearned Revenue/Accrued Revenue during the periods presented is as follows:

 
 
December 31,
 
 
2018
 
2019
Unearned Revenue
 
 

 
 

Cash received in advance of service provided – Current liability
 
$
4,925

 
$
1,826

Deferred revenue resulting from varying charter rates – Current liability
 
484


1,214

Deferred revenue resulting from varying charter rates – Non-Current liability
 
253


648

Total Unearned Revenue
 
$
5,662

 
$
3,688

Accrued Revenue
 
 
 
 
Resulting from varying charter rates – Current asset
 
475

 
158

Resulting from varying charter rates – Non-Current asset
 
614

 
455

Total Accrued Revenue
 
$
1,089

 
$
613