FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2021

FAIR VALUE MEASUREMENTS

Schedule of fair value, liabilities measured on recurring and nonrecurring basis

The following tables provide the fair value measurements of applicable financial liabilities as of December 31, 2021 and 2020:

	Financial liabilities at fair value as of December 31, 2021
(in thousands)	Level 1		Level 2		Level 3		Total
5% Notes	$	—	$	—	$	360	$	360
Total	$	—	$	—	$	360	$	360

	Financial liabilities at fair value as of December 31, 2020
	Level 1		Level 2		Level 3		Total
5% Notes	$	—	$	—	$	938	$	938
Total	$	—	$	—	$	938	$	938

Schedule of change in level three fair value during period

The following table summarizes the changes in Level 3 instruments for the years ended December 31, 2020 and 2021:

(in thousands)
Balance at January 1, 2020	$	190
Interest accrued on face value of 5% Notes		976
Change in fair value of Level 3 liabilities		(228)
Balance at December 31, 2020		938
Interest accrued on face value of 5% Notes		1,023
Change in fair value of Level 3 liabilities		(1,601)
Balance at December 31, 2021	$	360