Quarterly report pursuant to Section 13 or 15(d)

PREPAID EXPENSES AND OTHER ASSETS

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PREPAID EXPENSES AND OTHER ASSETS
 3 Months Ended
Mar. 31, 2022
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:
  March 31, 2022 December 31, 2021
  (thousands of dollars)
Prepaid license $ 250  $ 500 
Prepaid insurance premiums —  1,145 
Spare parts 2,561  2,114 
Other prepaid expenses and assets 585  554 
Total prepaid expenses and other assets $ 3,396  $ 4,313