FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2019

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, 2019 and 2018:

	Financial liabilities at fair value as of December 31, 2019
(in thousands)	Level 1		Level 2		Level 3		Total
5% Notes	$	—	$	—	$	190	$	190
Total	$	—	$	—	$	190	$	190

	Financial liabilities at fair value as of December 31, 2018
	Level 1		Level 2		Level 3		Total
5% Notes	$	—	$	—	$	67	$	67
Total	$	—	$	—	$	67	$	67

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, 2018 and 2019:

(in thousands)
Balance at January 1, 2018	$	128
Interest accrued on face value of 5% Notes		878
Conversion of 5% Notes		—
Change in fair value of Level 3 liabilities		(939)
Balance at December 31, 2018		67
Interest accrued on face value of 5% Notes		924
Conversion of 5% Notes		—
Change in fair value of Level 3 liabilities		(801)
Balance at December 31, 2019	$	190