Quarterly report pursuant to Section 13 or 15(d)

ACCRUED LIABILITIES

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ACCRUED LIABILITIES
3 Months Ended
Mar. 31, 2021
Accrued Liabilities [Abstract]  
ACCRUED LIABILITIES ACCRUED LIABILITIES
Accrued liabilities consisted of the following:
  March 31, 2021 December 31, 2020
  (thousands of dollars)
State taxes $ 45  $ 125 
Property taxes 906  — 
Payroll 2,104  2,282 
Royalties 391  260 
Officer compensation 368  1,053 
Foreign taxes —  1,054 
AMAK transaction costs —  559 
Other 2,188  1,524 
Total accrued liabilities $ 6,002  $ 6,857