ACCRUED LIABILITIES (Tables)

12 Months Ended

Dec. 31, 2021

Accrued Liabilities [Abstract]

Schedule of Accrued Liabilities

Accrued liabilities at December 31 are summarized as follows:
	2021		2020
	(thousands of dollars)
Accrued state taxes	$	192	$	125
Accrued payroll	3,123		2,282
Accrued royalties	294		260
Accrued officer compensation	989		1,053
Accrued professional expenses	287		559
Accrued foreign taxes	—		1,054
Other liabilities	988		1,524
Total	$	5,873	$	6,857