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Derivative Liabilities (Tables)
12 Months Ended
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Changes in Fair Value of Derivative Liabilities
Changes in the fair value of recurring measurements are presented as other income, net in our statements of operations and comprehensive loss and were as follows:
(in thousands)20242023
January 1,$675 $1,656 
Changes in estimated fair value
2018 Exit Fee— 292 
2022 Exit Fee325 227 
2018 Exit Fee payment— (1,500)
2022 Exit Fee payment
(1,000)— 
Fair value of exit fee derivative liabilities at December 31,$— $675