FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2021

FAIR VALUE MEASUREMENTS

Schedule of Fair Value on Recurring and Non-recurring Basis

	September 30, 2021
(thousands of dollars)	Level 1		Level 2		Level 3		Total
Current Assets
Equity securities	$	3,438	$	—	$	—	$	3,438
Land grant		—		—		1,378		1,378
Total current assets recorded at fair value	$	3,438	$	—	$	1,378	$	4,816

	December 31, 2020
(thousands of dollars)	Level 1		Level 2		Level 3		Total
Current Assets
Equity securities	$	—	$	—	$	1,520	$	1,520
Total current assets recorded at fair value	$	—	$	—	$	1,520	$	1,520
Non-current Assets
Restricted cash	$	10	$	—		—	$	10
Total non-current assets recorded at fair value	$	10	$	—	$	—	$	10