XML 43 R19.htm IDEA: XBRL DOCUMENT v3.20.4
ACCRUED LIABILITIES
 12 Months Ended
Dec. 31, 2020
Accrued Liabilities [Abstract]  
ACCRUED LIABILITIES ACCRUED LIABILITIES
Accrued liabilities at December 31 are summarized as follows:
20202019
(thousands of dollars)
Accrued state taxes$125 $— 
Accrued payroll2,282 1,250 
Accrued royalties260273
Accrued officer compensation1,053 1,687 
Accrued professional expenses559 1,000 
Accrued foreign taxes1,054 — 
Other liabilities1,524 1,532 
Total$6,857 $5,742