Quarterly report pursuant to Section 13 or 15(d)

PREPAID EXPENSES AND OTHER ASSETS

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PREPAID EXPENSES AND OTHER ASSETS
 6 Months Ended
Jun. 30, 2021
Prepaid Expense and Other Assets, Current [Abstract]  
PREPAID EXPENSES AND OTHER ASSETS PREPAID EXPENSES AND OTHER ASSETS
Prepaid expenses and other assets consisted of the following:
  June 30, 2021 December 31, 2020
  (thousands of dollars)
Prepaid license $ —  $ 403 
Prepaid insurance premiums 1,355  4,241 
Spare parts 2,366  2,376 
Cash held in escrow by AMAK 823  1,877 
Other prepaid expenses and assets 550  301 
Total prepaid expenses and other assets $ 5,094  $ 9,198