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Revenue and Accounts Receivable Credit Concentration - Additional Information (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Sources of revenue, description |  |  |  | We derive our revenue from two sources: (i) Diagnostic Tests, providing lung diagnostic testing services for healthcare providers associated with our five blood-based tests and (ii) Development Services, providing diagnostic testing services to biopharmaceutical, life sciences, and diagnostic companies. |  |
Revenue recognized |  |  |  | $ 1,700 |  |
Deferred revenue | $ 2,773 | $ 2,773 |  | 2,773 |  | $ 678
Accounts receivable, net of allowance for credit losses | 35 | $ 35 |  | $ 35 |  | 481
Revenue | Minimum | Customer Concentration Risk | Medicare |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Concentration risk, percentage |  | 30.00% | 40.00% | 34.00% | 40.00% |
Development Services |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Deferred revenue | 2,400 | $ 2,400 |  | $ 2,400 |  |
Non-refundable, up-front payment | 3,000 |  |  |  |  |
Accounts receivable, net of allowance for credit losses | 3,000 | 3,000 |  | 3,000 |  |
Up Front Cash Payments |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Deferred revenue | 3,800 | 3,800 |  | 3,800 |  |
Other Long-term Liabilities |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |
Non-current deferred revenue | $ 100 | $ 100 |  | $ 100 |  | $ 100

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