Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Income Tax Jurisdiction, Domestic Federal Income Tax Jurisdiction, Domestic Federal [Member] Title of 12(b) Security Title of 12(b) Security Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Schedule of Fair Value Hierarchy of Financial Assets Measured at Fair Value Fair Value, Assets Measured on Recurring Basis [Table Text Block] Common stock $0.001 par value per share, 1,500,000,000 shares authorized as of June 30, 2026 and December 31, 2025 and 44,666,234 and 40,331,360 shares issued and outstanding as of June 30, 2026 and December 31, 2025 Common Stock, Value, Issued 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Accrued compensation expenses Employee-related Liabilities, Current Illumina, Inc. Illumina, Inc. [Member] Illumina, Inc. Entity Ex Transition Period Entity Ex Transition Period Restatement Determination Date Restatement Determination Date Release of restricted stock units (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Payments for royalties Royalty Obligation, Rate Reduction Monetary Threshold Royalty Obligation, Rate Reduction Monetary Threshold Allowance for credit losses Accounts Receivable, Allowance for Credit Loss Amendment Flag Amendment Flag Current liabilities: Liabilities, Current [Abstract] Credit loss expense Accounts Receivable, Credit Loss Expense (Reversal) Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Leases [Abstract] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] 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Related Party Transactions [Abstract] Cash flows from operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted-average shares of common stock used in computing net loss per share—Diluted (in shares) Weighted-average shares of common stock —diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Number of class action complaints Loss Contingency, Class Action Complaints, Number Loss Contingency, Class Action Complaints, Number Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party 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[Abstract] Rent payments Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Area of real estate property Area of Real Estate Property Changes in operating assets and liabilities: Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] All Executive Categories All Executive Categories [Member] U.S. government treasury bills US Government Debt Securities [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Depreciation Depreciation Antidilutive Securities [Axis] Antidilutive Securities [Axis] Represented by: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Sales and marketing Sales and marketing Selling and Marketing Expense Operating 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Restricted Stock Award, Net of Forfeitures Remaining lease term Lessee, Operating Lease, Remaining Lease Term Segment Reporting [Line Items] Segment Reporting [Line Items] Tenant improvement receivable, current Nontrade Receivables, Current Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Supplies Prepaid Supplies Proceeds from sale of common stock Sale of Stock, Consideration Received on Transaction Trade accounts receivable, gross Accounts Receivable, before Allowance for Credit Loss, Current Total costs and operating expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Counterparty Name [Domain] Counterparty Name [Domain] Total stockholders’ equity Beginning balance Ending balance Equity, Attributable to Parent Total other income, net Nonoperating Income (Expense) Assets Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total operating lease liabilities Operating Lease, Liability Intangible and other assets impairment Intangible and other assets impairment Intangible Asset, Including Goodwill, Impairment Loss Insider Trading Policies and Procedures [Line 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Key Entity Central Index Key All Adjustments to Compensation All Adjustments to Compensation [Member] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Accounts Receivable Accounts Receivable [Member] LEGAL PROCEEDINGS, COMMITMENTS, AND CONTINGENCIES Legal Matters and Contingencies [Text Block] Reportable Segment Reportable Segment [Member] Reportable Segment Income Statement [Abstract] Issuance of common stock under ESPP (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Document Transition Report Document Transition Report Ownership [Axis] Ownership [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Grant date fair value Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Fair Value City Area Code City Area Code Accumulated Other Comprehensive Income/(Loss) AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Amortization of intangible assets Amortization Of Intangible Assets, Including Portion Allocated To Sales And Marketing Amortization Of Intangible Assets, Including Portion Allocated To Sales And Marketing Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Entity [Domain] Entity [Domain] One Customer One Customer [Member] One Customer Accounts Receivable, Net Accounts Receivable [Policy Text Block] Preferred stock, 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Payment Arrangement, Expense Other non-current liabilities Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Number of marketable securities in an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Accumulated Deficit Retained Earnings [Member] Operating lease liabilities, net of current portion Operating Lease, Liability, Noncurrent Money market funds Money Market Funds [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Net loss per share—Diluted (in dollars per share) Diluted (in dollars 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reconcile net loss to net cash used by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Expected royalty obligation, rate (as a percent) Expected Royalty Obligation, Rate Expected Royalty Obligation, Rate Cash flows from financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Financial Instruments [Domain] Financial Instruments [Domain] Numerator Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount REVENUE Revenue from Contract with Customer [Text Block] Issuance of common stock and recognition of the Samsung Stock Purchase Agreement, including the deferred asset, net of tax benefit and issuance costs Stock Issued During Period, Value, New Issues Premium share price (as a percent) Premium Share Price, Percent Premium Share Price, Percent State Jurisdiction Income Tax Jurisdiction, Domestic State and Local [Member] Incremental borrowing rate (as a percent) Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Segment Reporting [Table] Segment Reporting [Table] Related Party Transaction [Table] Related Party Transaction [Table] Sale of Stock [Axis] Sale of Stock [Axis] Schedule of components of lease cost Lease, Cost [Table Text Block] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Loss from operations Operating Income (Loss) Current Fiscal Year End Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Impairment charge Asset, Impairment Loss Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Number of financial institutions Number Of Financial Institutions Number Of Financial Institutions Equity Components [Axis] Equity Components [Axis] Accounts receivable, net Increase (Decrease) in Accounts Receivable Related Party Related Party [Member] Product and Service [Domain] Product and Service [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Development Services Development services revenue Developmental Services Revenue [Member] Developmental Services Revenue Entity Interactive Data Current Entity Interactive Data Current Tenant improvement receivable, noncurrent Nontrade Receivables, Noncurrent Deferred tax liability, net Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other current liabilities Other Liabilities, Current Other non-current assets Other Assets, Noncurrent Document Type Document Type Total accrued liabilities Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Shares issuable under ESPP Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Commercial Commercial [Member] Commercial Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Receivable Type [Axis] Receivable Type [Axis] Counterparty Name [Axis] Counterparty Name [Axis] Costs and operating expenses: Operating Costs and Expenses [Abstract] Liabilities and stockholders’ equity Liabilities and Equity [Abstract] All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Remainder of 2026 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year FAIR VALUE MEASUREMENTS, CASH EQUIVALENTS AND MARKETABLE SECURITIES Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Supplies Increase (Decrease) in Materials and Supplies Share price (in dollars per share) Share Price Initial term of lease Lessee, Operating Lease, Term of Contract PEO Name PEO Name Geographical [Axis] Geographical [Axis] Leasehold improvements Leasehold Improvements [Member] Restricted cash Restricted Cash Total Cash, Cash Equivalents, and Short-Term Investments Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Unvested performance options Unvested Performance Options Units [Member] Unvested Performance Options Units Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Cash, cash equivalents and restricted cash — beginning of period Cash, cash equivalents and restricted cash — end of period Total Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Accrued legal and professional service expenses Accrued Professional Fees, Current Accounts payable Increase (Decrease) in Accounts Payable Accrued other expenses Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] ORGANIZATION AND DESCRIPTION OF BUSINESS Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Total lease costs Lease, Cost Accrued clinical studies and research and development expenses Accrued Clinical Studies Expenses, Current Accrued Clinical Studies Expenses, Current Customer [Domain] Customer [Domain] LEASES Lessee, Operating Leases [Text Block] Net loss per share—Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net Total accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Accumulated deficit Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Restricted cash Restricted Cash, Noncurrent Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Operating lease costs Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Cover [Abstract] Reclassification Reclassification, Comparability Adjustment [Policy Text Block] International Non-US [Member] Concentration risk, percentage Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and stockholders’ equity Liabilities and Equity Variable lease costs Variable Lease, Cost Grail, Inc. Grail, Inc. [Member] Grail, Inc. Employee Stock Option Share-Based Payment Arrangement, Option [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Schedule of Accounts Receivable, Net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Other income (expense), net Other Nonoperating Income (Expense) Name Awards Close in Time to MNPI Disclosures, Individual Name Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items] Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] General and administrative General and administrative General and Administrative Expense Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Common stock, price per share sold (in dollar per share) Sale of Stock, Price Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, par value of $0.001 per share; 50,000,000 shares authorized, no shares issued and outstanding as of June 30, 2026 and December 31, 2025 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Short-term marketable securities Total short-term marketable securities Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Cost of screening revenue (exclusive of amortization of intangible assets) Cost Of Screening Revenue [Member] Cost Of Screening Revenue Name Measure Name TAXES Income Tax Disclosure [Text Block] Cash and Cash Equivalent [Table] Cash and Cash Equivalent [Table] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other Other Noncash Income (Expense) Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Tax benefit recognized in connection with the Samsung SPA deferred asset Tax Benefit Recognized In Connection With SPA Deferred Asset Tax Benefit Recognized In Connection With SPA Deferred Asset Additional Paid in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Cost of development services revenue Cost Of Development Services Revenue [Member] Cost Of Development Services Revenue Unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position Supplemental cash flow information: Supplemental Cash Flow Elements [Abstract] Schedule of Calculation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block] Accrued liabilities Accrued Liabilities Name Trading Arrangement, Individual Name Cash and cash equivalents Cash equivalents in money market accounts Cash deposits and cash equivalents Cash and Cash Equivalent Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Depreciation and intangible assets amortization Depreciation, Depletion and Amortization Amortization of discount on marketable securities Investment Income, Net, Amortization of Discount and Premium Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Current assets: Assets, Current [Abstract] Weighted-average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Right-of-use assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Subsidiary, Sale of Stock [Line Items] Subsidiary, Sale of Stock [Line Items] Benefit from income taxes Benefit from income taxes Income Tax Expense (Benefit) Customer Concentration Risk Customer Concentration Risk [Member] Cost of revenue Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Basis of Presentation and Principles of Consolidation Consolidation, Policy [Policy Text Block] Net decrease in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Operating lease right-of-use assets and liabilities, net Increase (Decrease) In Operating Lease Right-Of-Use Assets And Liabilities, Net Increase (Decrease) In Operating Lease Right-Of-Use Assets And Liabilities, Net Net loss Net loss Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from maturities of marketable securities Proceeds From Maturities Of Marketable Securities Proceeds From Maturities Of Marketable Securities Interest income Investment Income, Interest Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Less: Tenant improvement allowance* Lessee, Operating Lease, Liability, Tenant Improvements Lessee, Operating Lease, Liability, Tenant Improvements Revenue: Revenues [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]