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Customer Customer [Domain] Finite-Lived Intangible Assets, Major Class Name Finite-Lived Intangible Assets, Major Class Name [Domain] Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Business Combination, Consideration Transferred Business Combination, Consideration Transferred, Total Total consideration amount BioPharma services. BioPharma Services General Equipment [Member] General equipment. General Equipment Fair value assets, transfers between levels, amount Fair Value Assets Transfers Between Levels Amount Fair value assets, transfers between levels, amount. Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Total Preferred Stock, Value, Issued Preferred stock, value Preferred stock, $0.0001 par value per share, 1,000 shares authorized, no shares issued or outstanding as of June 30, 2025, and December 31, 2024 Laboratory Information System Platform Laboratory Information System Platform [Member] Laboratory information system platform. Ming Hsieh [Member] Ming Hsieh Minimum Minimum Minimum [Member] Financial Instrument [Axis] Current assets Assets, Current [Abstract] Amortization of intangible assets Amortization of Intangible Assets, Total Amortization of Intangible Assets Level 3 Fair Value, Inputs, Level 3 [Member] Segment Reporting [Abstract] Information about Financial Assets Measured at Fair Value on Recurring Basis Based on Three-Tier Fair Value Hierarchy Fair Value, Assets Measured on Recurring Basis [Table Text Block] Current liabilities Liabilities, Current [Abstract] Related Party Transactions [Abstract] Schedule of Future Fixed Lease Payments from Tenants for All Noncancelable Operating Leases Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Shares, Outstanding Ending Balance, Shares Beginning Balance, Shares Accounts Receivable, after Allowance for Credit Loss, Current, Total Receivables from contract with customers Accounts Receivable, after Allowance for Credit Loss, Current Trade accounts receivable, net of allowance for credit losses of $21,416 as of June 30, 2025, and $20,458 as of December 31, 2024 Restricted Cash and Cash Equivalents, Total Restricted Cash and Cash Equivalent Restricted cash Commitments and Contingencies Commitments and Contingencies (Note 8) Adjustment for credit losses Credit loss Current period provision Short-Term Equity Securities Short Term Equity Securities [Member] Short term equity securities. 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Weighted Average Common Shares [Abstract] Weighted-average common shares: Segments [Axis] Long-Lived Tangible Asset Long-Lived Tangible Asset [Domain] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Subsequent Events Subsequent Events [Text Block] Related Party Transactions Disclosure [Text Block] Related Party Other Significant Balance Sheet Accounts [Text Block] Other significant balance sheet accounts. Other Significant Balance Sheet Accounts APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total Equity-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total Fulgent stockholders' equity Equity, Attributable to Parent Preferred stock, par value Preferred Stock, Par or Stated Value Per Share AHMC Healthcare Inc. A H M C Healthcare Inc [Member] AHMC healthcare Inc. Statement of Stockholders' Equity [Abstract] Reclassification from other comprehensive income (loss) Other Comprehensive Income (Loss) before Reclassifications, Tax Other Comprehensive Income (Loss) before Reclassifications, Tax, Total Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year 2025 (remaining 6 months) Use of Estimates Use of Estimates, Policy [Policy Text Block] Trade Accounts Receivable and Allowance for Credit Losses Credit Loss, Financial Instrument [Policy Text Block] Leasehold Improvements Leasehold Improvements [Member] Selling and Marketing Selling and Marketing Expense [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary of Significant Accounting Policies [Line Items] United States UNITED STATES Noncontrolling Interest Noncontrolling Interest [Member] Schedule of Accrued Liabilities [Table Text Block] Schedule of Accrued Liabilities Debt Instrument, Name Debt Instrument, Name [Domain] Total Other current assets Other Assets, Current Supplemental disclosures of non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Date of acquisition completed Business Combination, Effective Date of Acquisition Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Increase (Decrease) in Other Operating Assets, Total Other current and long-term assets Increase (Decrease) in Other Operating Assets Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Reagents and supplies Reagents And Supplies Current Reagents and supplies current. Building Building [Member] Credit Facility Credit Facility [Axis] Equity Method Investment, Ownership Percentage Ownership percentage Overview and Basis of Presentation Business Description and Basis of Presentation [Text Block] Finance Lease, Liability, to be Paid, Year One 2026 Debt Securities Debt Securities [Member] Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items] Other Noncurrent Assets [Member] Other Long-Term Assets Operating Leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Related Party Related and Nonrelated Parties [Axis] Net realized loss on marketable securities Marketable Security, Realized Gain (Loss) Entity Address, City or Town Entity Address, City or Town Stock Repurchased During Period, Shares Number of shares repurchased Repurchase of common stock, Shares Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Share based compensation allocation of recognized period costs. Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Number of reporting segments Number of Reportable Segments Security Exchange Name Security Exchange Name Credit Facility Credit Facility [Domain] Indefinite-Lived Intangible Assets (Excluding Goodwill) Indefinite-Lived Intangible Assets (Excluding Goodwill), Ending Balance Indefinite-Lived Intangible Assets (Excluding Goodwill), Beginning Balance Indefinite-Lived Intangible Assets (Excluding Goodwill), Total Acquisitions-related intangibles, net Stock repurchased, additional amount paid Stock Repurchased During Period Additional Amount Paid Stock repurchased during period additional amount paid. Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Total Fixed assets, gross Property, Plant and Equipment, Gross Customer one. Customer One [Member] Customer One Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest (Loss) income before income taxes Loss before income taxes Concentration Risk Type Concentration Risk Type [Domain] Stockholders' Equity Note [Abstract] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash, cash equivalents, and restricted cash at beginning of period Cash, cash equivalents, and restricted cash at end of period Total cash, cash equivalents, and restricted cash Interest Paid, Excluding Capitalized Interest, Operating Activity Interest Paid Statistical Measurement Statistical Measurement [Domain] Total current assets Assets, Current Total Equity-based compensation expense Share-Based Payment Arrangement, Expense Equity-based compensation Document Period End Date Document Period End Date Title and Position [Axis] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Foreign currency translation (loss) gain Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Foreign currency translation income (loss) Vacation accrual Accrued Vacation, Current Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Weighted-Average Amortization Period Estimated amortization life of identified intangible assets assumed Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Statement of Financial Position [Abstract] Restricted Stock Units Restricted Stock Units (RSUs) [Member] Realized losses available-for-sale securities Debt Securities, Available-for-Sale, Realized Loss Purchased Patent Purchased Patent [Member] Purchased patent. Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Supplemental disclosures of cash flow information: Retirement Plans Compensation and Employee Benefit Plans [Text Block] Finance Lease Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Total liabilities Liabilities US Government Debt Securities [Member] U.S. Government Debt Securities Financial Instruments [Domain] Preferred Stock Of Privately Held Company Preferred Stock Of Privately Held Company [Member] Preferred Stock Of Privately Held Company [Member] Equity Method Investments Equity Method Investments [Policy Text Block] Lessee, Operating Lease, Liability, to be Paid, Year Two 2027 Automobile Automobile [Member] Automobile. Amortization of ROU assets Finance Lease, Right-of-Use Asset, Amortization Indefinite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Gross, Total Acquisitions-related intangibles, gross Finite-Lived Intangible Assets, Gross Weighted Average Number of Shares Outstanding, Diluted, Total Weighted-average common shares—outstanding, diluted Diluted Weighted Average Number of Shares Outstanding, Diluted Entity File Number Securities Act File Number Marketable and non-marketable securities, Unrealized Losses Equity Securities Fv Ni Accumulated Gross Unrealized Loss Before Tax Equity securities fv ni accumulated gross unrealized loss before tax. Clinical Patients Contracts Clinical Patients Contracts [Member] Clinical patients contracts. OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Net gain (loss) on available-for-sale debt securities, net of tax Cover [Abstract] Schedule Of Trading Securities And Other Trading Assets [Line Items] Debt and Equity Securities, FV-NI [Line Items] Recorded Unconditional Purchase Obligation, Due in Next Rolling 12 Months Purchase obligations, payable within 12 months ANP technologies inc [Member]. A N P Technologies Inc [Member] ANP Technologies Inc Fair value assets, transfers between levels, amount Fair value assets transfer between levels amount. Fair Value Assets Transfer Between Levels Amount HRSA Uninsured Program Member Health Resources And Services Administration Uninsured Program Member Health resources and services administration uninsured program member. Revenue Revenue Benchmark [Member] Number of operating segments Number of Operating Segments Reportable Segment and Geographic Information Segment Reporting Disclosure [Text Block] General and Administrative Expense, Total General and administrative General and Administrative Expense Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Stock Issued During Period, Shares, Acquisitions Common stock issued in a business combination, Shares Subsequent Event [Table] Proceeds from sale of marketable securities Proceeds From Sale Of Marketable Securities Proceeds from maturity of marketable securities. Institutional Customer Institutional Customer [Member] Institutional customer. Intangible assets, net Finite-Lived Intangible Assets, Net, Ending Balance Finite-Lived Intangible Assets, Net, Beginning Balance Acquisitions-related intangibles, net Finite-Lived Intangible Assets, Net Useful life in years Property, Plant and Equipment, Useful Life Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Contract liability Contract liabilities Contract with Customer, Liability, Current Ownership [Axis] Depreciation, Total Depreciation expense on fixed assets Depreciation Debt Commitments And Contingencies [Table] Debt Commitments And Contingencies [Table] Debt, commitments and contingencies. Other Receivables, Net, Current, Total Other receivable Other Receivables, Net, Current Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common stock, shares outstanding Common Stock, Shares, Outstanding Operating lease liabilities - short term Operating lease liabilities, short term Operating Lease, Liability, Current Depreciation, Depletion and Amortization, Total Depreciation and amortization Depreciation, Depletion and Amortization Document Transition Report Document Transition Report Total operating expenses Operating Expenses Research and Development Expense, Total Research and development Research and Development Expense Impairment loss Asset Impairment Charges Asset Impairment Charges, Total Impairment loss Cost of Revenue, Total Cost of revenue Cost of Revenue Related party costs Payments for Repurchase of Common Stock Repurchase of common stock Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Net comprehensive loss from consolidated operations Statement of Cash Flows [Abstract] Weighted-average effect of dilutive securities: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Reconciliation of Assets from Segment to Consolidated [Table] Equity [Text Block] Stock Repurchase Program Finite Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Loss per Share Earnings Per Share [Text Block] Finance leases term of expiration Finance Lease Term Of Expiration Finance lease term of expiration. Computer Hardware Computer Equipment [Member] Net loss attributable to Fulgent Net (loss) income attributable to common shareholders Share Based Compensation Allocation Of Recognized Period Costs [Table] Share Based Compensation Allocation Of Recognized Period Costs [Table] Share based compensation allocation of recognized period costs. Summary of Equity and Debt Securities Schedule Of Available For Sale Debt Securities And Equity Trading Securities Reconciliation Table [Text Block] Schedule of available for sale debt securities and equity/trading securities reconciliation. Operating lease cost Operating Lease, Cost Increase (decrease) in customer deposit. Increase Decrease In Customer Deposit Customer deposits Total intangible assets, net Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Accounts Receivable, Allowance for Credit Loss [Table Text Block] Roll-Forward for Allowance for Credit Losses Tax Effects Related To Unrealized Holding Loss On Available For Sale Debt Securities Tax effects related to unrealized holding loss on available for sale debt securities. Tax effects related to unrealized holding gain on available-for-sale debt securities Purchase Obligation, Total Purchase Obligation Purchase obligations Increase (Decrease) in Prepaid Taxes Prepaid income tax Prepaid income tax Assets Assets [Abstract] Short-Term Marketable Securities Short Term Marketable Securites [Member] Short-term marketable securites. Document Fiscal Year Focus Document Fiscal Year Focus Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Cash flow from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Retirement Benefits [Abstract] Accounts Payable, Current, Total Accounts payable Accounts Payable, Current Interest Expense, Nonoperating, Total Interest Expense, Nonoperating Interest expense Interest expense Cash equivalents, Unrealized Gains Cash Equivalents Unrealized Gains Cash equivalents unrealized gains. Research and Development Research and Development Expense [Member] Defined Contribution Plan, Employer Matching Contribution, Percent of Match Employer matching contribution, percent of match Finite-Lived Intangible Asset, Expected Amortization, Year One 2026 Summary of Annual Amortization Expense For Acquisition-Related Intangibles Finite-Lived Intangible Assets Amortization Expense [Table Text Block] Investment in Private Equity Securities Private Equity Funds Private Equity Funds [Member] Fair Value Disclosures [Abstract] Investment in Debt and Equity Instruments and Cash and Cash Equivalent [Text Block] Equity and Debt Securities Lessee, Operating Lease, Liability, to be Paid, Year One 2026 Schedule Of Supplemental Information Related To Leases Table [Text Block] Schedule of supplemental information related to leases. Schedule of Supplemental Information Related to Leases Net loss attributable to Fulgent Net Income (Loss) Available to Common Stockholders, Basic Net Income (Loss) Available to Common Stockholders, Basic, Total Business Combination, Pro Forma Information [Table Text Block] Summary of Unaudited Pro Forma Financial Information Common stock shares issued upon expiration of hold back provisions Common Stock Shares Issued Upon Expiration Of Hold Back Provisions Common stock shares issued upon expiration of hold back provisions. Debt Instrument [Axis] Debt Instrument Lessee, Operating Lease, Liability, to be Paid, after Year Five Thereafter Share-Based Payment Arrangement [Abstract] Schedule of Operating and Finance Lease Right-of-Use Asset, Short-term Lease Liabilities, and Long-term Lease Liabilities Schedule Of Lease Right Of Use Asset Short Term Lease Liabilities And Long Term Lease Liabilities Table [Text Block] Schedule of lease right-of-use asset, short-term lease liabilities, and long-term lease liabilities. Total equity securities, debt securities and cash equivalents Total equity securities, debt securities and cash equivalents Assets, Fair Value Disclosure Concentration risk, percentage Concentration Risk, Percentage Revenues Revenues, Total Revenues Revenue from related parties Increase (Decrease) in Income Taxes Receivable Increase to income taxes receivable Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash provided by (used in) investing activities Finance Lease, Weighted Average Remaining Lease Term Weighted average remaining lease term - finance lease Title of 12(b) Security Title of 12(b) Security Schedule Of Segment Reporting Information By Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Insurance Type and Tier Identifier [Axis] Share Repurchase Program, Remaining Authorized, Amount Stock repurchase program, remaining authorized amount Subsegments [Domain] Money Market Accounts Money Market Funds [Member] Related Party Related and Nonrelated Parties [Domain] Ming Hsieh, the Chief Executive Officer and Chairman Ming Hsieh, the Chief Executive Officer and Chairman [Member] Ming Hsieh, the Chief Executive Officer and Chairman. Income Taxes Income Tax Disclosure [Text Block] Preferred stock investment policy. Preferred Stock Investment, Policy [Policy Text Block] Preferred Stock Investment Equity and debt securities, Amortized Cost Basis Available For Sale Securities Debt Equity Securities And Trading Securities Amortized Cost Basis Available for sale securities debt, equity securities and trading securities amortized cost basis. Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year 2025 (remaining 6 months) Total Other long-term liabilities Other Liabilities, Noncurrent Finance lease right-of-use assets Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total Finance lease ROU asset, net Finance Lease, Right-of-Use Asset, after Accumulated Amortization Reconciliation of Revenue from Segments to Consolidated [Table] Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Major Classes of Fixed Assets Property, Plant and Equipment [Table Text Block] Accounts Receivable, after Allowance for Credit Loss, Related Party, Type [Extensible Enumeration] Accounts Receivable, after Allowance for Credit Loss, Related Party [Extensible Enumeration] Income Tax Disclosure [Abstract] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Business Combination [Text Block] Business Combinations Unrecognized Tax Benefits, Ending Balance Unrecognized Tax Benefits, Beginning Balance Unrecognized tax benefits Unrecognized Tax Benefits Additional Paid-In Capital Additional Paid-in Capital [Member] Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Accrued liabilities and other liabilities Goodwill and Indefinite-Lived Intangibles Goodwill and Intangible Assets, Intangible Assets, Indefinite-Lived, Policy [Policy Text Block] Installment Sale Contract Instalment Sale Contract. Measurement Frequency Measurement Frequency [Domain] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Share Repurchase Program, Authorized, Amount Stock repurchase program, authorized amount Income Statement Location Statement of Income Location, Balance [Axis] Trading Symbol Trading Symbol Schedule Of Finite Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Fixed Assets Property, Plant and Equipment Disclosure [Text Block] Schedule Of Related Party Transactions By Related Party [Table] Related Party Transaction [Table] Investment in private securities unobservable input Total equity trading securities Marketable and non-marketable securities, Aggregate Fair Value Director [Member] Ming Hsieh Subsequent Event Type [Axis] Cash flow from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Related Party Transaction, Purchases from Related Party Purchased from related party Fair Value Measurements Recurring Fair Value, Recurring [Member] Entity Ex Transition Period Entity Ex Transition Period Office of inspector general. Office Of Inspector General [Member] OIG Total lease payments Lessee, Operating Lease, Liability, to be Paid Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Customer deposit Customer Deposit Customer deposit. Selling and Marketing Expense, Total Selling and marketing Selling and Marketing Expense Equity Components Equity Components [Axis] Accounts payable Accounts Payable Accounts Payable, Total Nonoperating Income (Expense) Total other (expense) income, net Total other (expense) income, net Equity Component Equity Component [Domain] Goodwill and Intangible Assets Disclosure [Abstract] Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Summary of Consideration Paid and Amount of Assets Acquired and Liabilities Assumed Business Combination [Axis] Redeemable Preferred Stock Investment Redeemable Preferred Stock [Member] Income tax refund Proceeds from Income Tax Refunds Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total Restricted stock awards, Shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Potential liability. Potential Liability Potential liability Customer Customer [Axis] Notes payable, long term Notes payable, noncurrent portion Notes Payable, Noncurrent Notes Payable, Noncurrent, Total Impairment of available-for-sale debt securities Impairment of available-for-sale debt securities. Impairment Of Available-For-Sale Debt Securities Impairment of available-for-sale debt securities Statement of Comprehensive Income [Abstract] Assets Not Yet Placed in Service Assets Not Yet Placed In Service [Member] Assets not yet placed in service. Maximum Maximum [Member] Gross unrealized loss Available For Sale Debt Securities And Equity Trading Securities Gross Unrealized Losses Available for sale debt securities and equity trading securities gross unrealized losses. Statistical Measurement Statistical Measurement [Axis] Less: accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Prepaid Expense, Current, Total Prepaid expenses Prepaid Expense, Current Segment, Reconciliation of Other Items from Segments to Consolidated [Table] Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common Stock, Value, Issued Common stock, $0.0001 par value per share, 50,000 shares authorized, 34,028 shares issued and 30,608 shares outstanding as of June 30, 2025, and 33,614 shares issued and 30,841 shares outstanding as of December 31, 2024 Principal paid for finance lease Finance Lease, Principal Payments Fulgent Pharma Holdings Fulgent Pharma Holdings [Member] Fulgent Pharma Holdings. Other significant balance sheet accounts. Other Significant Balance Sheet Accounts [Table] Other Significant Balance Sheet Accounts [Table] Total stockholders’ equity Beginning Balance Ending Balance Equity, Including Portion Attributable to Noncontrolling Interest Realized gain available-for-sale securities Debt Securities, Available-for-Sale, Realized Gain Related Party Transaction, Amounts of Transaction Service of related party Loss per Share, diluted Diluted Income (Loss) from Continuing Operations, Per Diluted Share Impairment of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Roll-Forward for Allowance for Credit Losses Schedule of allowance for doubtful accounts on accounts receivable. Schedule Of Allowance For Doubtful Accounts On Accounts Receivable Table [Text Block] Marketable securities interest receivable Marketable Securities Interest Receivable Current Marketable securities interest receivable current. Director And Officer [Member] Director and officer. Preferred stock, shares authorized Preferred Stock, Shares Authorized Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest, Total Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive loss attributable to noncontrolling interest Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class Voluntary Disclosure Process Voluntary Disclosure Process [Member] Voluntary disclosure process. Common stock withholding for employee tax obligations Payment, Tax Withholding, Share-Based Payment Arrangement Payment, Tax Withholding, Share-Based Payment Arrangement, Total Related Party Transaction [Line Items] Related Party Transaction [Line Items] Entity Registrant Name Entity Registrant Name Debt securities, Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Customer Concentration Risk Customer Concentration Risk [Member] Finite-Lived Intangible Asset, Expected Amortization, Year Two 2027 Other Nonoperating Income (Expense), Total Other Nonoperating Income (Expense) Other income, net Subsequent Events [Abstract] Finite-Lived Intangible Asset, Expected Amortization, Year Three 2028 Income Tax Expense (Benefit), Total Income Tax Expense (Benefit) Provision for (benefit from) income taxes Benefit from income taxes Unrealized loss available-for-sale securities Debt Securities, Available-for-Sale, Unrealized Loss Measurement Frequency Measurement Frequency [Axis] Therapeutic Development Therapeutic Development [Member] Therapeutic development. Stock Repurchased During Period, Value Aggregate cost of shares repurchased Repurchase of common stock Long-term marketable securities. Long Term Marketable Securities [Member] Long-Term Marketable Securities Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Concentrations of Credit Risk, Customers, and Suppliers Concentration of Customers Concentration Risk, Credit Risk, Policy [Policy Text Block] Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Consolidation Items [Axis] Fulgent Pharma LLC Fulgent Pharma Limited Liability Company [Member] Fulgent Pharma Limited Liability Company. Write-downs Accounts Receivable, Allowance for Credit Loss, Writeoff Payments to Acquire Property, Plant, and Equipment, Total Purchases of fixed assets Payments to Acquire Property, Plant, and Equipment Acquisition of percentage Percentage Of Acquisition Percentage of acquisition. Equity and debt securities, Aggregate Fair Value Available For Sale Securities Debt Equity Securities And Trading Securities Available for sale securities debt equity securities and trading securities. Assets Total assets Assets Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment [Table] Income Statement [Abstract] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Deferred Income Tax Expense (Benefit), Total Deferred taxes Deferred Income Tax Expense (Benefit) Business Combination [Abstract] Schedule of Information Regarding Operations and Assets for Operating Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Operating Segments [Member] Operating Segments Finite-Lived Intangible Asset, Expected Amortization, Year Five 2030 Title and Position [Domain] Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] Useful life in years City Area Code City Area Code Other Comprehensive Income (Loss), Net of Tax, Total Other Comprehensive Income (Loss), Net of Tax Other comprehensive gain (loss) Other comprehensive income (loss), net In-place lease intangible assets. In-Place Lease Intangible Assets [Member] In-Place Lease Intangible Assets Finance lease liabilities, long term Finance Lease, Liability, Noncurrent Intangible Assets, Finite-Lived, Policy [Policy Text Block] Finite-Lived Intangible Assets Summaries of Goodwill and Acquisitions-Related Intangibles Balances Schedule of Intangible Assets and Goodwill [Table Text Block] Weighted average remaining lease term - operating leases Operating Lease, Weighted Average Remaining Lease Term Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Land Improvements Land Improvements [Member] Finance lease cost: Finance Leases Cost [Abstract] Finance leases cost. Total lease cost Lease, Cost Debt Securities Due After One Year Through Five Years [Member] Debt securities due after one year through five years. Debt Securities due After 1 Year through 5 Years Business Combination, Consideration Transferred, Equity Interest Contingent consideration Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Fixed assets, net Fixed assets, net Property, Plant and Equipment, Net U.S. Agency Debt Securities U S Agency Debt Securities [Member] U.S. agency debt securities. Genetic Sequencing Services Genetic Sequencing Service [Member] Genetic sequencing service. Yankee Debt Securities Yankee Debt Securities [Member] Yankee debt securities. Operating loss Operating Income (Loss) Operating (loss) income Operating loss Retained Earnings Retained Earnings [Member] Share-based Payment Arrangement, Noncash Expense, Total Equity-based compensation Share-Based Payment Arrangement, Noncash Expense SEC investigation. SEC Investigation [Member] SEC Investigation Other significant balance sheet accounts. Other Significant Balance Sheet Accounts [Line Items] Other Significant Balance Sheet Accounts [Line Items] Weighted average discount rate - operating leases Operating Lease, Weighted Average Discount Rate, Percent Operating lease liabilities, long term Operating Lease, Liability, Noncurrent Level 1 Fair Value, Inputs, Level 1 [Member] Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash used in financing activities Notes Payable, Total Notes payable Notes Payable Lease, Cost [Table Text Block] Schedule of Operating and Finance Lease Expense Deferred tax liabilities Deferred Income Tax Liabilities, Net Schedule of Other Current Assets Schedule of Other Current Assets [Table Text Block] Nonoperating Income (Expense) [Abstract] Other income (expenses): Goodwill [Table] In-Process Research & Development In-Process Research & Development [Member] In-Process Research & Development Foreign Non-US [Member] Anti-dilutive Securities Excluded from Calculation of Diluted Loss per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Corporate Debt Securities Corporate Debt Securities [Member] Entity Interactive Data Current Entity Interactive Data Current Contract liabilities Increase (Decrease) in Contract with Customer, Liability Income Statement Location Statement of Income Location, Balance [Domain] Cash flow from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Furniture and Fixtures Furniture and Fixtures [Member] Segment Reporting, Revenue Reconciling Item [Line Items] Less: Cash equivalents, Unrealized Gains Adjustment of Cash Equivalents Accumulated Gross Unrealized Gain Before Tax Adjustment of cash equivalents accumulated gross unrealized gain before tax. Less: Cash equivalents, Carrying Value Cash Equivalents, at Carrying Value, Total Cash Equivalents, at Carrying Value Less: Cash equivalents, Carrying Value Entity Tax Identification Number Entity Tax Identification Number Stockholders’ equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Land Land [Member] Prepaid income taxes Prepaid Taxes Repayment of notes payable Repayments of Notes Payable Type and Tier Identifier [Domain] Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Local Phone Number Local Phone Number Related Party Transaction Related Party Transaction [Domain] Medical Lab Equipment Medical Lab Equipment [Member] Medical lab equipment. Unrealized gain available-for-sale securities Debt Securities, Available-for-Sale, Unrealized Gain Laboratory Services Laboratory Services [Member] Laboratory services. Total Other current liabilities Other Liabilities, Current Due to related parties Short-term lease cost Short-Term Lease, Cost China CHINA Goodwill And Intangible Assets [Line Items] Goodwill And Intangible Assets [Line Items] Goodwill and intangible assets. Finance Lease, Liability, to be Paid, Year Two 2027 Contingently issuable shares. Contingently Issuable Shares [Member] Contingently Issuable Shares Accounting Policies [Abstract] Disaggregation Of Revenue [Line Items] Disaggregation of Revenue [Line Items] Insurance revenue for services related to claims Revenue from Contract with Customer, Excluding Assessed Tax, Total Revenue from contracts with customers by payor type Revenue Recorded Unconditional Purchase Obligation, Due in Rolling Year Five Purchase obligations, payable within next 5 years Schedule of Other Long-term Assets Schedule of Other Assets, Noncurrent [Table Text Block] Redeemable Preferred Stock Investment Redeemable Preferred Stock Investment [Member] Redeemable preferred stock investment. Aircraft Aircraft [Member] Aircraft. Lessee, Operating Lease, Liability, to be Paid, Year Four 2029 Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Less (add): Accounting Standards Update 2014-09 Accounting Standard Update 201409 [Member] Accounting standard update 201409. Accrued legal liabilities Accrued Professional Fees, Current Entity Emerging Growth Company Entity Emerging Growth Company Indefinite-Lived Intangible Assets [Axis]