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Revenue and Accounts Receivable Credit Concentration - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 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 |  |  | $ 800 |  |
Deferred revenue | $ 617 |  | $ 617 |  | $ 678
Revenue | Minimum | Customer Concentration Risk | Medicare |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Concentration risk, percentage | 33.00% | 41.00% | 35.00% | 41.00% |
Up Front Cash Payments |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Deferred revenue | $ 700 |  | $ 700 |  |
Other Long-term Liabilities |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Non-current deferred revenue | $ 200 |  | $ 200 |  | $ 200

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