Derivative Liabilities (Tables)

12 Months Ended

Dec. 31, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Changes in Fair Value of Derivative Liabilities

Changes in the fair value of recurring measurements included in Level 3 of the fair value hierarchy are presented as other income, net in our Statements of Operations and were as follows for the years ended December 31, 2022, 2021 and 2020 (in thousands):

	2022		2021		2020
Balance at January 1,	$	698	$	1,376	$	969
2022 Exit Fee addition at fair value	375		—		—
Changes in estimated fair value:
2018 Exit Fee	510		(678)		407
2022 Exit Fee	73		—		—
Fair value of exit fee derivative liabilities at December 31,	$	1,656	$	698	$	1,376