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Summary of Significant Accounting Policies - Additional Information (Details)
 12 Months Ended
Dec. 31, 2024
USD ($)
Test
Dec. 31, 2023
USD ($)
Feb. 28, 2025
USD ($)
Nov. 16, 2022
USD ($)
Summary Of Significant Accounting Policies [Line Items]        
Cash and cash equivalents $ 26,245,000 $ 26,284,000    
Net losses 42,931,000 52,146,000    
Accumulated deficit 462,497,000 419,566,000    
Restricted cash $ 100,000 $ 100,000    
Restricted Cash, Current, Statement of Financial Position [Extensible Enumeration] Other current assets Other current assets    
Impairment of long-lived assets $ 0 $ 0    
Impairment of intangible assets $ 200,000      
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration] Impairment of Intangible Assets, Finite-Lived      
Goodwill impairments loss $ 0      
Description of lease For lease classification determination, Management continues to use (i) 75% or greater to determine whether the lease term is a major part of the remaining economic life of the underlying asset and (ii) 90% or greater to determine whether the present value of the sum of lease payments is substantially all of the fair value of the underlying asset.      
Reserve for inventory   100,000    
Excess and obsolete inventory $ 22,000 166,000    
Number of blood based lung cancer test | Test 5      
Tranche C Loan | Subsequent Event        
Summary Of Significant Accounting Policies [Line Items]        
Aggregate loan amount     $ 10,000,000  
Product Life and Patent Life        
Summary Of Significant Accounting Policies [Line Items]        
Finite-lived intangible asset, useful life 10 years      
Minimum        
Summary Of Significant Accounting Policies [Line Items]        
Property, plant and equipment, useful Lives 3 years      
Maximum        
Summary Of Significant Accounting Policies [Line Items]        
Property, plant and equipment, useful Lives 5 years      
Other Current Assets        
Summary Of Significant Accounting Policies [Line Items]        
Inventory $ 1,000,000 1,400,000    
Other Long-term Assets        
Summary Of Significant Accounting Policies [Line Items]        
Refundable deposit 5,000,000 5,000,000    
Net finance lease ROU assets $ 2,200,000 $ 1,100,000    
Perceptive Term Loan | Tranche C Loan | Subsequent Event        
Summary Of Significant Accounting Policies [Line Items]        
Aggregate loan amount     $ 10,000,000  
Perceptive Term Loan | Maximum | Tranche C Loan        
Summary Of Significant Accounting Policies [Line Items]        
Aggregate loan amount       $ 10,000,000