Quarterly report pursuant to Section 13 or 15(d)

ACCRUED LIABILITIES

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ACCRUED LIABILITIES
 3 Months Ended
Mar. 31, 2022
Accrued Liabilities [Abstract]  
ACCRUED LIABILITIES ACCRUED LIABILITIES
Accrued liabilities consisted of the following:
  March 31, 2022 December 31, 2021
  (thousands of dollars)
State taxes $ 288  $ 192 
Property taxes 760  — 
Payroll 1,179  1,406 
Royalties 454  294 
Incentive compensation 3,168  3,508 
Legal 165  — 
Professional expenses —  287 
Other 1,109  186 
Total accrued liabilities $ 7,123  $ 5,873