SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2021

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Schedule of Cash, Cash Equivalents and Restricted Cash

	As of December 31,
(thousands of dollars)	2021		2020
Cash and cash equivalents	$	115,293	$	50,315
Restricted cash		—		10
Cash, cash equivalents and restricted cash shown in the statement of cash flows	$	115,293	$	50,325

Schedule of Fair Value on Recurring and Non-recurring Basis

	December 31, 2021
(thousands of dollars)	Level 1		Level 2		Level 3		Total
Non-current Assets
Land grant	$	—	$	—		1,378	$	1,378
Total non-current assets recorded at fair value	$	—	$	—	$	1,378	$	1,378
Non-current Liabilities
Land grant obligation	$	—	$	—		(1,378)	$	(1,378)
Total non-current liabilities recorded at fair value	$	—	$	—	$	(1,378)	$	(1,378)

	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