Quarterly report pursuant to Section 13 or 15(d)

PREPAID EXPENSES AND OTHER ASSETS

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PREPAID EXPENSES AND OTHER ASSETS
 9 Months Ended
Sep. 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:
  September 30, 2021 December 31, 2020
  (thousands of dollars)
Prepaid license $ —  $ 403 
Prepaid insurance premiums 2,748  4,241 
Spare parts 2,219  2,376 
Cash held in escrow by AMAK —  1,877 
Other prepaid expenses and assets 1,676  301 
Total prepaid expenses and other assets $ 6,643  $ 9,198