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Stock, Shares Outstanding 2024 Long-Term Debt, Maturity, Year Two Business Combinations Business Combinations Policy [Policy Text Block] Debt Instrument [Axis] Debt Instrument [Axis] Present value of lease liabilities Finance Lease, Liability Property, plant and equipment, gross Property, Plant and Equipment, Gross Income Tax Disclosure [Abstract] Revolving credit facility Line of Credit Facility, Maximum Borrowing Capacity Related party costs Total related party costs Related Party Transaction, Expenses from Transactions with Related Party Weighted-average remaining lease term (years) Weighted Average Rate of Time Deposits [Abstract] Prepaid expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Restructuring reserve, beginning balance Restructuring reserve, ending balance Restructuring Reserve Business combination contingent consideration percentage of milestone payment based on revenue target Business Combination Contingent Consideration Percentage of Applicable Milestone Payment on Revenue Target Business Acquisition Percentage of Applicable Milestone Payment on Revenue Target Capitalized software Software and Software Development Costs [Member] Accrued benefits Accrued Employee Benefits, Current Change in operating assets and liabilities, net of effects from purchase of business: Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] Additional paid-in capital Additional Paid in Capital 2026 Lessee Operating And Finance And Liability To Be Paid, Year Four Lessee Operating And Finance And Liability To Be Paid, Year Four 2026 Finance Lease, Liability, to be Paid, Year Four Thereafter Long-Term Debt, Maturity, After Year Four Long-Term Debt, Maturity, After Year Four Statistical Measurement [Domain] Statistical Measurement [Domain] Stock option exercises (in shares) Options exercised (in shares) Share-Based Compensation Arrangement by Share-Based 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Credit Facility, Covenant, Liquidity Threshold Line Of Credit Facility, Covenant, Liquidity Threshold Scenario [Axis] Scenario [Axis] Total financial assets Assets, Fair Value Disclosure Ownership [Axis] Ownership [Axis] Repayment of long-term debt Early Repayment of Senior Debt Percentage of converted share Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Leases Lessee, Operating Leases [Text Block] Depreciation and amortization of leased assets Finance Lease, Right-of-Use Asset, Amortization Software amortization expense Capitalized Computer Software, Amortization Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Related Party [Domain] Related Party [Domain] Plan Name [Axis] Plan Name [Axis] Balance Balance Contract with Customer, Asset, after Allowance for Credit Loss Price per shares (in Dollars per share) Business Acquisition, Share Price CMLS Holdings LLC CMLS Holdings, LLC [Member] CMLS Holdings LLC [Member] Warrant liability Warrant Liability Warrant liabilities. 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Government Assistance [Axis] Government Assistance [Axis] Government Assistance Award Type [Axis] Award Type [Axis] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Redemption price per warrant (in usd per warrant) Redemption Price Per Warrant Redemption Price Per Warrant Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Operating Operating Lease, Liability, Current Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Business acquisition of revenue Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Business combination and net cash received Business Combination, Acquired Sales-type Lease Receivable Entity Listings [Line Items] Entity Listings [Line Items] Related 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Supplemental disclosures of cash flow information Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Options forfeited and cancelled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Outstanding borrower Line Of Credit Facility, Covenant, Outstanding Borrowings Line Of Credit Facility, Covenant, Outstanding Borrowings Liability reserve, potential recoupments Contract with Customer, Refund Liability, Current Restructuring Type [Axis] Restructuring Type [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Segments [Axis] Segments [Axis] Weighted Average Grant Date Fair Value Per Unit (in us dollar per share) Weighted Average Grant Date Fair Value Per Unit (in us dollar per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average 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Period End Date Accrued payroll Accrued Salaries, Current Share-based Payment Arrangement, Tranche One Share-Based Payment Arrangement, Tranche One [Member] Shares issued for PIPE, net of issuance costs Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Fair value of net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Master Loan Agreement Master Loan Agreement [Member] Master Loan Agreement Total assets Assets Accounts receivable, allowance for credit loss, writeoff Accounts Receivable, Allowance for Credit Loss, Writeoff Debt Disclosure [Abstract] Debt Disclosure [Abstract] Private placement financing to sell Sale of Stock, Consideration Received Per Transaction Earnings Per Share [Abstract] Supplier [Domain] Supplier [Domain] Income Statement Location [Axis] Income Statement Location [Axis] Share-based Payment Arrangement, Tranche Three Share-Based Payment Arrangement, Tranche Three [Member] Schedule of 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exercise price, options exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Thereafter Lessee, Operating Lease, Liability, to be Paid, Year Five Net cash provided by (used) in financing activities Net Cash Provided by (Used in) Financing Activities Emerging Growth Company Emerging Growth Company [Policy Text Block] Emerging growth company. 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Accrued Sales Commission, Current Public warrants (in shares) Warrants to Purchase Public Warrants Warrants to Purchase Public Warrants Cash paid for amounts included in the measurement of lease liabilities Cash paid for amounts included in the measurement of lease liabilities [Abstract] Cash paid for amounts included in the measurement of lease liabilities Cash, Cash Equivalents and Restricted Cash Cash and Cash Equivalents, Policy [Policy Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] TSA Agreement Related Party, TSA Agreement [Member] Related Party, TSA Agreement Award Type [Domain] Award Type [Domain] Grantee Status [Axis] Grantee Status [Axis] Weighted-average vesting period for compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Schedule of Acquired Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Computer equipment Computer Equipment [Member] Stock consideration paid for purchase of business Payments to Acquire Businesses, Gross Gross profit (loss) Gross Profit Entity Registrant Name Entity Registrant Name Shares issued for PIPE, net of issuance costs (in Shares) Stock Issued During Period, Shares, New Issues Tax Credit Carryforward [Line Items] Tax Credit Carryforward [Line Items] Fair value re-measurement period for the liability awards Share-based Compensation Arrangement by Share-based Payment Award, Options, Re-Measurement Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Re-Measurement Period Weighted average price of shares purchased (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Per Share Weighted Average Price of Shares Purchased SVB Agreement SVB Agreement [Member] SVB Agreement Subsequent Events Subsequent Events [Text Block] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Supplier Concentration Risk Supplier Concentration Risk [Member] Inventory Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Public Warrants Public Warrants [Member] Public Warrants Customer relationships Customer Relationships [Member] Contract Assets Change In Contract With Customer, Asset [Roll Forward] Change In Contract With Customer, Asset Entity Address, City or Town Entity Address, City or Town Leases [Abstract] Expected term (in years) Measurement Input, Expected Term [Member] Employee Share-Based Payment Arrangement, Employee [Member] Minimum threshold price of common stock specified to send notice of redemption to the warrant holders (in usd per share) Minimum Threshold Price of Common Stock Specified to Send Notice of Redemption to the Warrant Holders Minimum Threshold Price of Common Stock Specified to Send Notice of Redemption to the Warrant Holders Less: imputed interest Lessee Operating And Finance And Liability, Undiscounted Excess Amount Lessee Operating And Finance And Liability, Undiscounted Excess Amount Minimum Minimum [Member] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Revenue recognized Contract with Customer, Liability, Revenue Recognized, Including Opening Balance Contract with Customer, Liability, Revenue Recognized, Including Opening Balance Provision for excess and obsolete inventory Inventory Write-down Total Lessee Operating And Finance And Liability To Be Paid Lessee Operating And Finance And Liability To Be Paid Commitments and Contingencies Disclosure 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Listings [Table] Entity Listings [Table] Restricted stock units granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Government Assistance [Domain] Government Assistance [Domain] Government Assistance [Domain] Effective tax rate (percent) Effective Income Tax Rate Reconciliation, Percent Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Risk-free interest rate Measurement Input, Risk Free Interest Rate [Member] Due from related parties Due from Related Parties, Current Use of Estimates Use of Estimates, Policy [Policy Text Block] Money market funds Cash and Cash Equivalents, Fair Value Disclosure Business Combination Business Combination Disclosure [Text Block] Reserves for refunds to insurance carriers Accrued Insurance, Current Aggregate purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Subsequent Events [Abstract] Subsequent Events [Abstract] Concentration risk, percentage Concentration Risk, Percentage Deferred employer payroll tax paid Payment Of Deferred Payroll Taxes Payment Of Deferred Payroll Taxes Expected volatility, maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Pro forma net loss Business Acquisition, Pro Forma Net Income (Loss) Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Income Taxes Income Tax Disclosure [Text Block] DECD Loan Agreement DECD Loan Agreement [Member] DECD Loan Agreement Payables Due to Related Parties Debt instrument interest Payment for Debt Extinguishment or Debt Prepayment Cost Number of borrowers Line Of Credit, Covenant, Adjusted Quick Ratio Line Of Credit, Covenant, Adjusted Quick Ratio Credit Facility [Domain] Credit Facility [Domain] 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GeneDX Holding 2, Inc. [Member] GeneDX Holding 2, Inc. Accumulated deficit Retained Earnings [Member] Unrecognized stock-based compensation cost on the unvested stock options Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Thereafter Finance Lease, Liability, to be Paid, Year Five Debt forgiven Debt Instrument, Decrease, Forgiveness Total lease cost Lease, Cost Common Stock Common Stock [Member] Schedule of Stock-Based Compensation Expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Schedule of Lease, Cost Lease, Cost [Table Text Block] Number of reportable segments Number of Reportable Segments Escrow period Escrow Period Escrow Period Contingent Consideration Business Combination, Contingent Consideration, Liability Class of Stock [Axis] Class of Stock [Axis] Schedule of Restricted Stock Units Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Statement [Table] Statement [Table] Restricted Stock Units vested (in us dollars 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Agent [Member] Escrow Agent Restricted Stock Units Outstanding (in shares) Restricted Stock Units Outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Current portion of the contingent consideration liabilities Business Combination, Contingent Consideration, Liability, Current Indefinite-Lived Intangible Assets [Line Items] Indefinite-Lived Intangible Assets [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Total other income (expense), net Nonoperating Income (Expense) Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Finite-lived intangible assets, gross Finite-Lived Intangible Assets, Gross Loss Contingencies [Table] Loss Contingencies [Table] Gain in fair value of warrant and contingent liabilities Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Operating lease right-of-use assets Operating lease assets Operating Lease, Right-of-Use Asset Indemnification liabilities Indemnification Liabilities, Current Indemnification Liabilities, Current Due To Related Parties Due To Related Parties [Member] Due To Related Parties Government Assistance, CARES Act, Provider Relief Fund Government Assistance, CARES Act, Provider Relief Fund [Member] Government Assistance, CARES Act, Provider Relief Fund Purchase of aggregate private placement warrants (in shares) Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Operating lease cost Operating Lease, Expense Non-cash lease expense Noncash Lease Expense Noncash Lease Expense Type of Restructuring [Domain] Type of Restructuring [Domain] Document Transition Report Document Transition Report Local Phone Number Local Phone Number Master Lease Agreement Master Lease Agreement [Member] Master Lease Agreement Loss from operations Operating Income (Loss) Inventory Increase (Decrease) in Inventories Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Legacy Sema4 Shareholder payout Payments for Repurchase of Other Equity Number of shares granted (in shares) Share-Based Payment Arrangement, Number Of Individuals, Granted Share-Based Payment Arrangement, Number Of Individuals, Granted Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Number of shares issued and outstanding (in shares) Number of Shares Issued and Outstanding Number of Shares Issued and Outstanding Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Measurement Input, Option Volatility Measurement Input, Option Volatility [Member] Goodwill Goodwill Options and RSUs Options and Restricted Stock Units RSU [Member] Options and Restricted Stock Units RSU Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Income tax benefit Income tax benefit Income tax benefit Income Tax Expense (Benefit) Deferred taxes Deferred Income Tax Liabilities, Net GeneDx GeneDx [Member] GeneDx Preferred stock par value (in Dollars per share) Preferred Stock, Par or Stated Value Per Share 2026 Lessee, Operating Lease, Liability, to be Paid, Year Four Income Statement [Abstract] Income Statement [Abstract] Options granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Additional paid-in capital Additional Paid-in Capital [Member] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Document Fiscal Period Focus Document Fiscal Period Focus Restricted cash Restricted Cash, Noncurrent Contingent consideration first milestone payment Business Combination Contingent Consideration First Milestone Payment Business Combination Contingent Consideration First Milestone Payment Cost of services (including related party expenses of $1,348 and $1,008 for the three months ended and $2,404 and $1,286 for the six months ended June 30, 2022 and 2021, respectively) Cost of services Cost of Goods and Services Sold Weighted average shares outstanding, diluted (in shares) Weighted average shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Expected volatility, minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Less: accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 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Key Entity Central Index Key Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Other non-current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets Restricted cash held as escrow, period Business Acquisition Restricted Cash Held As Escrow Period Business Acquisition Restricted Cash Held As Escrow Period Interest income Investment Income, Interest Measurement Frequency [Axis] Measurement Frequency [Axis] Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Vested restricted stock 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