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Summary of Significant Accounting Policies - Summary of Disaggregated Amounts of Operating Expenses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Summary Of Significant Accounting Policies [Line Items]    
Segment research and development $ (14,478) $ (15,859)
Segment general and administrative (9,726) (22,216)
Adjustments and reconciling items 0 0
Consolidated operating loss (24,204) (38,075)
Operating Segments [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Segment research and development [1],[2] (13,607) (13,380)
Segment general and administrative [1] (8,226) (12,598)
Stock-based compensation (2,313) (12,039)
Depreciation expense (58) (58)
Consolidated operating loss $ (24,204) $ (38,075)
[1] Depreciation expense of $31,000 and $29,000, related to research and development and $28,000 and $28,000, related general and administration have been excluded for the years ended December 31, 2024 and 2023, respectively.
[2] Stock-based compensation expense of $840,000 and $2,449,000, related to research and development and $1,473,000 and $9,590,000, related to general and administration have been excluded for the years ended December 31, 2024 and 2023, respectively.