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Other assets
 12 Months Ended
Dec. 31, 2020
Text block [abstract]  
Other assets
17.
Other assets

 
  
2020
 
  
2019
 
Current -
  
   
  
   
Interest receivable
  
$
6,457
 
  
$
12,838
 
Other
  
 
1,348
 
  
 
1,368
 
 
  
 
 
 
  
 
 
 
 
  
 
7,805
 
  
 
14,206
 
Non-current
-
  
   
  
   
Guarantee deposits
  
 
3,010
 
  
 
4,121
 
Deposits for litigation
  
 
8,126
 
  
 
10,548
 
Other
  
 
3,212
 
  
 
3,212
 
 
  
 
 
 
  
 
 
 
 
  
 
14,348
 
  
 
17,881
 
 
  
 
 
 
  
 
 
 
 
  
$
22,153
 
  
$
32,087
 
 
  
 
 
 
  
 
 
 
Guarantee deposits are mainly amounts paid to fuel suppliers, as required at the inception of the agreements (see note 23).
Deposit for litigation is cash deposited into the escrow account until the related dispute is settled (see note 21).