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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Operating Loss Carryforwards [Line Items]    
Income tax provision $ 0 $ 0
Percentage of valuation allowance against deferred tax assets 100.00%  
Increase in deferred tax assets valuation allowance $ 2,800 7,000
New York State    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards net, expected to expire unutilized and unavailable to offset future federal taxable income 191,100  
New York City    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards net, expected to expire unutilized and unavailable to offset future federal taxable income 175,400  
Federal    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 301,100 307,600
Operating loss carryforwards, annual limitation 28  
Operating loss carryforwards net, expected to expire unutilized and unavailable to offset future federal taxable income 197,500  
Operating loss carryforwards available for offset future taxable income 103,600  
Operating loss carryforwards for unlimited period 101,900  
Federal | Research and Development Tax Credit Carryforwards    
Operating Loss Carryforwards [Line Items]    
Tax credit carryforwards 8,100 7,400
Tax credit carryforwards expected to expire unutilized 3,000  
Federal | Expire Between 2019 and 2037    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards available for offset future taxable income 1,700  
State and City    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 5,000 4,900
State | Minimum    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 600  
State | Maximum    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 200,200  
City | Minimum    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 800  
City | Maximum    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 196,000  
Foreign    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards $ 40,300 $ 43,300