Schedule of RSU Rollforward Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] Cashback Rewards Cashback Rewards [Member] Cashback Rewards Statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent State Current State and Local Tax Expense (Benefit) Vested (in shares) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Schedule of Consideration from Vendors Schedule Of Consideration From Vendors [Table Text Block] Schedule Of Consideration From Vendors Leasehold improvements Leasehold Improvements [Member] Net (loss) income Net (loss) income Net Income (Loss) Attributable to Parent Consolidated Entities [Axis] Consolidated Entities [Axis] Operating lease ROU asset (included within Lease right-of-use assets) Operating Lease, Right-of-Use Asset Shares subject to repurchase related to stock options early exercised and not yet vested (in shares) Stock Subject To Repurchase During Period Due to Early Exercised And Not Fully Vested, Shares Stock Subject To Repurchase During Period Due to Early Exercised And Not Fully Vested, Shares Schedule Of Other Current Assets [Line Items] Schedule Of Other Current Assets [Line Items] Schedule Of Other Current Assets [Line Items] Income Statement Location [Axis] Income Statement Location [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Accrued deferred offering costs Accrued Deferred Offering Costs Accrued Deferred Offering Costs Name of each exchange on which registered Security Exchange Name Entity Incorporation, State Entity Incorporation, State or Country Code Cancelled/forfeited/expired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Schedule of Cashback Rewards Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Operating leases Operating Lease, Weighted Average Remaining Lease Term Beginning balance (in shares) Ending balance (in shares) Temporary Equity, Shares Outstanding Other assets Other Assets, Noncurrent Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Net increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Entity File Number Entity File Number 2024 Long-Term Debt, Maturity, Year Two Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Options cancelled/forfeited/expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Remainder of 2022 Long-Term Debt, Maturity, Remainder of Fiscal Year Subsequent Event Type [Domain] Subsequent Event Type [Domain] Organization, Consolidation and Presentation of Financial Statements [Abstract] Revenue Recognition and Deferred Revenue [Abstract] Antidilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Operating leases Operating Lease, Weighted Average Discount Rate, Percent Research and development Research and Development Expense [Member] Commercial building Building [Member] Stock split ratio, common stock Stockholders' Equity Note, Stock Split, Conversion Ratio Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Loss on impairment, receivables and sale or disposal of equipment Gain (Loss) On Impairment, Receivables And Sale Or Disposal Of Equipment Gain (Loss) On Impairment, Receivables And Sale Or Disposal Of Equipment Title of Individual [Domain] Title of Individual [Domain] Award Type [Domain] Award Type [Domain] Local Phone Number Local Phone Number Credit Facility [Domain] Credit Facility [Domain] Assets Assets [Abstract] Related Party Transactions [Abstract] 2025 Long-Term Debt, Maturity, Year Three Options exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Land Land [Member] Schedule of Stock Option Roll-forward Schedule of Stock Options Roll Forward [Table Text Block] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Beginning balance (in shares) Ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Accumulated deficit Retained Earnings [Member] Debt Instrument [Axis] Debt Instrument [Axis] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Related Party [Axis] Related Party [Axis] Secured Debt Secured Debt [Member] Accounts receivable Increase (Decrease) in Accounts Receivable Property, Plant and Equipment Property, Plant and Equipment [Line Items] Commitments and Contingencies Disclosure [Abstract] Increase in shares reserved for future issuance (in shares) Common Stock, Additional Capital Shares Reserved for Future Issuance Common Stock, Additional Capital Shares Reserved for Future Issuance Other current assets Increase (Decrease) in Other Current Assets Principal payments of finance leases Financing cash flows from finance leases Finance Lease, Principal Payments Prime Rate Prime Rate [Member] Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Share-based Payment Arrangement, Expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Basic (in dollars per share) Net (loss) income per share attributable to Class A, LT10 and LT50 common stockholders, basic (in dollars per share) Earnings Per Share, Basic 2025 Lessee, Operating Lease, Liability, to be Paid, Year Three REVENUE AND CERTAIN INCOME STATEMENT COMPONENTS Revenue from Contract with Customer [Text Block] Document Information Document Information [Line Items] Vesting of early exercised stock options Adjustments To Additional Paid In Capital, Value, Vesting Of Early Exercised Stock Options Adjustments To Additional Paid In Capital, Value, Vesting Of Early Exercised Stock Options Beginning balance (in shares) Ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 2023 Long-Term Debt, Maturity, Year One Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Four Lessee, Operating Lease, Liability, to be Paid, after Year Four Prepaid expenses Prepaid Expense, Current Employer contributions Defined Contribution Plan, Cost RSU Rollforward Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Common Stock, LT10 Common Stock, LT10 [Member] Common Stock, LT10 Numerator Earnings Per Share, Diluted [Abstract] 2021 Amended Term Loan Amended 2021 Term Loan [Member] Amended 2021 Term Loan Shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Operating cash flows from operating leases Operating Lease, Payments Non Statutory Options Non Statutory Options [Member] Non Statutory Options [Member] Issuance of restricted stock units Proceeds From Issuance Of Restricted Stock Units Proceeds From Issuance Of Restricted Stock Units Company borrowed Long-term Debt, Gross Plan Name [Axis] Plan Name [Axis] Long-term debt Long-term Debt Finance lease ROU asset (included within Lease right-of-use assets) Finance Lease, Right-of-Use Asset, after Accumulated Amortization Annual increase in shares reserved for future issuance (as a percent) Annual Increase In Shares Reserved For Issuance As A Percentage Of Common Shares Outstanding Annual Increase In Shares Reserved For Issuance As A Percentage Of Common Shares Outstanding Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Income Tax Disclosure [Abstract] Software Development Software Development [Member] Entity Small Business Entity Small Business Operating leases Lessee, Operating Lease, Liability, Payment, Due [Abstract] Shares converted (in shares) Conversion of Stock, Shares Converted Total liabilities and stockholders' equity Liabilities and Equity Permanent items and others Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Cashback rewards Contract with Customer, Liability, Current Scenario [Axis] Scenario [Axis] Options exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Additional paid-in capital Additional Paid in Capital Supplemental disclosure of cash flow information: Supplemental Cash Flow Elements [Abstract] Liabilities and stockholders' equity Liabilities and Equity [Abstract] Accounts payable Increase (Decrease) in Accounts Payable Schedule of Other Current Assets Schedule of Other Current Assets [Table Text Block] NET (LOSS) INCOME PER SHARE Earnings Per Share [Text Block] Reduction of operating lease right-of-use assets Operating Lease, Impairment Loss Operating expenses: Operating Expenses [Abstract] Entity Interactive Data Current Entity Interactive Data Current Research and development (R&D) credit Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Reference Rate Reference Rate [Member] Reference Rate Issuance of common stock upon exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Income tax receivable Income Taxes Receivable, Current Affiliated Entity Affiliated Entity [Member] Gross margin Gross Profit 2024 Lessee, Operating Lease, Liability, to be Paid, Year Two Options cancelled/forfeited/expired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Subsidiaries Subsidiaries [Member] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Address, State Entity Address, State or Province 2021 Incentive Plan The 2021 Incentive Plan [Member] The 2021 Incentive Plan Denominator Earnings Per Share, Diluted, Other Disclosures [Abstract] Deferred tax assets, net Deferred Income Tax Assets, Net Software development costs Payments to Develop Software Operating lease liabilities Increase (Decrease) in Operating Lease Liability General and administrative General and Administrative Expense Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Components of Income Tax Benefit (Provision) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Options exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Issuance of restricted stock units Stock Issued During Period, Value, Restricted Stock Award, Gross Line of Credit Line of Credit [Member] STOCK INCENTIVE PLANS Share-based Payment Arrangement [Text Block] Accounting Policies [Abstract] Weighted average remaining contractual life, options outstanding (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Payments of deferred offering costs Payments of Stock Issuance Costs Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Professional and other fees Accrued Professional Fees, Current Federal Current Federal Tax Expense (Benefit) Document Transition Report Document Transition Report Common stock Common Stock, Value, Issued Finance leases Finance Lease, Weighted Average Discount Rate, Percent Disaggregation of Revenue Disaggregation of Revenue [Line Items] Share-based compensation not yet recognized, recognition period (in years) Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Beginning balance (in dollars per share) Ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Basis of Presentation and Principles of Consolidation Basis of Accounting, Policy [Policy Text Block] Commitments and contingencies (Note 4) Commitments and Contingencies Long-term Debt, Fiscal Year Maturity Long-term Debt, Fiscal Year Maturity [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Amortization of ROU assets Finance Lease, Right-of-Use Asset, Amortization Accrual for uncertain tax positions Accrued Income Taxes, Noncurrent Remainder of 2022 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Cover [Abstract] Stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Periodic payment Debt Instrument, Periodic Payment, Principal Schedule of Revenue from Geographic Areas Revenue from External Customers by Geographic Areas [Table Text Block] Class of Stock [Axis] Class of Stock [Axis] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Partner payouts and advertising fees Accrued Partner Payouts And Advertising Fees, Current Accrued Partner Payouts And Advertising Fees, Current Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Weighted Average Remaining Lease Term [Abstract] Weighted Average Remaining Lease Term [Abstract] Weighted Average Remaining Lease Term Beginning balance Ending balance Temporary Equity, Carrying Amount, Attributable to Parent Accrued expense reports Accrued Liabilities, Current Revenue Revenue from Contract with Customer, Excluding Assessed Tax Less: imputed interest Finance Lease, Liability, Undiscounted Excess Amount Stock options Share-based Payment Arrangement, Option [Member] Prepaid expenses Increase (Decrease) in Prepaid Expense Document Information [Table] Document Information [Table] Document Quarterly Report Document Quarterly Report Common stock Common Stock [Member] Variable Rate [Axis] Variable Rate [Axis] Finance leases Finance Lease, Weighted Average Remaining Lease Term (Loss) income from operations Operating Income (Loss) Employer discretionary matching Defined Contribution Plan, Employer Discretionary Contribution Amount Related party loan receivable, current Notes Receivable, Related Parties, Current Expensify Card posted collateral for funds held for customers Card Collateral For Funds Held For Customers, Current Card Collateral For Funds Held For Customers, Current Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Delayed Term Loan Amended 2021 Term Loan Delayed Term Loan [Member] Amended 2021 Term Loan Delayed Term Loan Less: lease liabilities, current Operating Lease, Liability, Current GENERAL INFORMATION Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Year Focus Document Fiscal Year Focus Stock-based compensation Share-based Payment Arrangement, Noncash Expense Variable Rate [Domain] Variable Rate [Domain] Additional paid-in capital Additional Paid-in Capital [Member] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Depreciation expense Depreciation Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Other liabilities Increase (Decrease) in Other Operating Liabilities Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Maximum Maximum [Member] Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent [Abstract] Share-based Payment Arrangement [Abstract] Total liabilities Liabilities Cash in transit for funds held for customers Cash In Transit For Funds Held For Customers, Current Cash In Transit For Funds Held For Customers, Current 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 Award Type [Axis] Award Type [Axis] Options granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Intrinsic value of options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Schedule of Capitalization, Long-term Debt [Table] Schedule of Capitalization, Long-term Debt [Table] Schedule of Operating Lease Maturity Lessee, Operating Lease, Liability, Maturity [Table Text Block] Total stockholders' equity Beginning balance Ending balance Stockholders' Equity Attributable to Parent Common stock, shares issued (in shares) Common Stock, Shares, Issued City Area Code City Area Code Consideration from a vendor, net Consideration From Vendors, Net Consideration From Vendors, Net Entity Address, City Entity Address, City or Town Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Noncash investing and financing items: Noncash Investing and Financing Items [Abstract] Lease liabilities, non-current Operating Lease, Liability, Noncurrent Total lease payments Finance Lease, Liability, Payment, Due Loaned amount Debt Instrument, Face Amount 2023 Finance Lease, Liability, to be Paid, Year One Effective interest rate (as a percent) Debt Instrument, Interest Rate, Effective Percentage Other Other Accounts Payable and Accrued Liabilities Accumulated deficit Retained Earnings (Accumulated Deficit) Weighted-average stock options Share-based Payment Arrangement [Member] Restricted stock units Restricted Stock Units (RSUs) [Member] Statement of Stockholders' Equity [Abstract] Entity Filer Category Entity Filer Category Reconciliation of cash, cash equivalents and restricted cash to the consolidated balance sheets Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Income Statement [Abstract] Entity Registrant Name Entity Registrant Name Finance lease cost: Finance Lease Costs [Abstract] Finance Lease Costs 2025 Finance Lease, Liability, to be Paid, Year Three 2026 Finance Lease, Liability, to be Paid, Year Four Proceeds from issuance of common stock on exercise of stock options Proceeds from Stock Options Exercised Capitalized software, net Capitalized software, net Capitalized Computer Software, Net Related Party [Axis] Related Party Transaction [Axis] 2024 Finance Lease, Liability, to be Paid, Year Two Issuance of restricted stock units (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Provision for income taxes Total provision for income taxes Income Tax Expense (Benefit) Conversion of stock, notice period (in months) Conversion of Stock, Notice Period Conversion of Stock, Notice Period Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Amendment Flag Amendment Flag Equity Components [Axis] Equity Components [Axis] Entity Tax Identification Number Entity Tax Identification Number Antidilutive Securities [Axis] Antidilutive Securities [Axis] Document Fiscal Period Focus Document Fiscal Period Focus Total current assets Assets, Current Sales and marketing Selling and Marketing Expense [Member] Total lease payments Lessee, Operating Lease, Liability, to be Paid Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Cancelled/forfeited/expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Other Than Ten Percent Holder Other Than Ten Percent Holder [Member] Other Than Ten Percent Holder Schedule Of Other Current Assets [Table] Schedule Of Other Current Assets [Table] Schedule Of Other Current Assets [Table] Voting right per share (vote) Common Stock, Voting Right Per Share Common Stock, Voting Right Per Share Repurchases of early exercised stock options Stock Repurchased During Period, Value Statement of Financial Position [Abstract] Schedule of Supplemental Balance Sheet Information Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee Less: income allocated to participating securities Less: income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Share-based compensation expense not yet recognized Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Current portion of long-term debt, net of issuance costs Less: current portion, net of issuance costs Long-term Debt, Current Maturities Product and Service [Axis] Product and Service [Axis] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Stock-based compensation - federal Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent Chief Executive Officer Chief Executive Officer [Member] Weighted average grant date fair value of options granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Component [Domain] Equity Component [Domain] Sales and marketing Selling and Marketing Expense 2023 Lessee, Operating Lease, Liability, to be Paid, Year One Repurchases of early exercised stock options (in shares) Shares repurchased (in shares) Stock Repurchased During Period, Shares Diluted net (loss) income per share: Diluted Net Income Per Share [Abstract] Diluted Net Income Per Share Accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Repurchases of early exercised stock options Payments For The Repurchases Of Early Exercised Stock Options Payments For The Repurchases Of Early Exercised Stock Options Statement [Line Items] Statement [Line Items] Domestic Plan Domestic Plan [Member] Restricted cash included in other assets Restricted Cash, Noncurrent Weighted average exercise price per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Unamortized debt issuance cost Less: discount for issuance costs Debt Issuance Costs, Noncurrent, Net Other commitments Other Commitment Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Counterparty Name [Domain] Counterparty Name [Domain] 2026 Lessee, Operating Lease, Liability, to be Paid, Year Four Less: lease liabilities, current Finance Lease, Liability, Current Purchase price as a percentage of common stock (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Matching plan payroll liability Employee Stock Purchase Plan Payroll Liability Employee Stock Purchase Plan Payroll Liability (Loss) income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 2026 and thereafter Long Term Debt Maturities Repayments Of Principal Year Four and After Year Four Long Term Debt Maturities Repayments Of Principal Year Four and After Year Four Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Schedule of Capitalization, Long-term Debt Schedule of Capitalization, Long-term Debt [Line Items] Borrowings under line of credit Less: line of credit Line of Credit, Current Interest on lease liabilities Finance Lease, Interest Expense Restricted common stock liability for early stock option exercises Restricted Common Stock Liability For Early Stock Option Exercises, Current Restricted Common Stock Liability For Early Stock Option Exercises, Current Use of Estimates Use of Estimates, Policy [Policy Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Schedule of Stock-based Compensation Expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Forecast Forecast [Member] Finance leases Finance Lease, Liability, Payment, Due [Abstract] Entity Ex Transition Period Entity Ex Transition Period Title of each class Title of 12(b) Security Total assets Assets Plan Name [Domain] Plan Name [Domain] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Geographical [Domain] Geographical [Domain] Net (loss) income attributable to Class A, LT10 and LT50 common stockholders, diluted Net Income (Loss) Available to Common Stockholders, Diluted Title of Individual [Axis] Title of Individual [Axis] Net (loss) income attributable to Class A, LT10 and LT50 common stockholders Net Income (Loss) Available to Common Stockholders, Basic Document Type Document Type Product and Service [Domain] Product and Service [Domain] Research and development Research and Development Expense CERTAIN BALANCE SHEET COMPONENTS Supplemental Balance Sheet Disclosures [Text Block] Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Share-based Compensation Arrangement by Share-based Payment Award Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Revolving Credit Facility Revolving Credit Facility [Member] Thereafter Finance Lease, Liability, to be Paid, after Year Four Finance Lease, Liability, to be Paid, after Year Four Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Furniture and fixtures Furniture and Fixtures [Member] Matching shares Matching Plan [Member] Matching Plan Schedule of Lease Cost Lease, Cost [Table Text Block] Other Other Assets, Miscellaneous, Current Numerator Earnings Per Share, Basic [Abstract] Geographical [Axis] Geographical [Axis] Weighted-average number of basic shares outstanding (in shares) Weighted Average Number of Shares Weighted-average shares of common stock used to compute net (loss) income per share attributable to common stockholders, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in dollars per share) Net (loss) income per share attributable to Class A, LT10 and LT50 common stockholders, diluted (in dollars per share) Earnings Per Share, Diluted Effect of dilutive securities: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Cash paid for income taxes Income Taxes Paid, Net All other locations Non-US [Member] Cost of revenue, net Cost of Revenue Hosting and license fees Accrued Hosting And License Fees, Current Accrued Hosting And License Fees, Current Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Cashback rewards Revenue From Contract With Customer, Cash Rewards To Customer Revenue From Contract With Customer, Cash Rewards To Customer Settlement assets Increase (Decrease) in Settlement Assets Increase (Decrease) in Settlement Assets Related Party Transaction Related Party Transaction [Line Items] Vesting period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Basic net (loss) income per share: Basic Net Income Per Share [Abstract] Basic Net Income Per Share Expensify Payment LLC Expensify Payment LLC [Member] Expensify Payment LLC [Member] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Finance Lease Maturity Finance Lease, Liability, Fiscal Year Maturity [Table Text Block] Accounts payable Accounts Payable, Current Depreciation and amortization Depreciation, Depletion and Amortization Schedule of Capitalized Software Development Costs Schedule Of Capitalized Software Development Costs [Table Text Block] Schedule Of Capitalized Software Development Costs [Table Text Block] Less: accumulated amortization Capitalized Computer Software, Accumulated Amortization Total finance lease cost Finance Lease Cost Finance Lease Cost Convertible preferred stock Convertible preferred stock Convertible Preferred Stock [Member] Warrants (in shares) Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Increase (Decrease) in Temporary Equity Increase (Decrease) in Temporary Equity [Roll Forward] Document Period End Date Document Period End Date Entity Central Index Key Entity Central Index Key Antidilutive Securities Excluded from Computation of Earnings Per Share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Consolidated Entities [Domain] Consolidated Entities [Domain] Restricted cash included in settlement assets Restricted Cash Included In Settlement Assets Restricted Cash Included In Settlement Assets State tax Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Total lease cost Lease, Cost Schedule of Property And Equipment; and Depreciation And Amortization Property, Plant and Equipment [Table Text Block] Income Statement Location [Domain] Income Statement Location [Domain] Debt instrument, term (in years) Debt Instrument, Term Current income tax benefit (expense): Current Federal, State and Local, Tax Expense (Benefit) [Abstract] Additional shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Less: income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Property and equipment, net Property, Plant and Equipment, Net Total operating expenses Operating Expenses Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Intrinsic Value, Amount Per Share Other liabilities Other Liabilities, Noncurrent The 2019 Option Plan The 2019 Option Plan [Member] The 2019 Option Plan Capitalized software development costs Capitalized Computer Software, Gross Summary of Principal Payments on all Long-term Debt Schedule of Long-term Debt Instruments [Table Text Block] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Principal payments of term loan Repayments of long term debt Repayments of Long-term Debt Trading Symbol(s) Trading Symbol Restricted cash Restricted Cash Held For Related Party, Current Restricted Cash Held For Related Party, Current Net (loss) income per share attributable to Class A, LT10 and LT50 common stockholders: Earnings Per Share [Abstract] Property and equipment, gross Property, Plant and Equipment, Gross Related Party Transaction [Domain] Related Party Transaction [Domain] The 2009 Option Plan The 2009 Option Plan [Member] The 2009 Option Plan Line of Credit Facility [Table] Line of Credit Facility [Table] Beginning balance (in dollars per share) Ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Long-term debt, net of issuance costs Long-term Debt, Excluding Current Maturities Initial Term Loan Amended 2021 Term Loan Initial Term Loan [Member] Amended 2021 Term Loan Initial Term Loan Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Stock based compensation expense Share-based Payment Arrangement, Expense Settlement assets Settlement Assets, Current Vesting of early exercised stock options Proceeds From Vesting Of Restricted Common Stock Proceeds From Vesting Of Restricted Common Stock Weighted average remaining contractual life, options exercisable (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Entity Current Reporting Status Entity Current Reporting Status Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Weighted average grant date fair value per share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Total Effective Income Tax Rate Reconciliation, Percent Payment of commitments to related party Payment Of Commitments To Related Party Payment Of Commitments To Related Party Defined Contribution Plan Defined Contribution Plan Disclosure [Line Items] Ten Percent Holder Ten Percent Holder [Member] Ten Percent Holder Restricted cash included in other current assets Restricted Cash, Current Amortization of debt issuance costs Amortization of Debt Issuance Costs Counterparty Name [Axis] Counterparty Name [Axis] Construction in progress Construction in Progress [Member] Common Class A Common Class A [Member] Contract assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Cash and cash equivalents and restricted cash, beginning of period Cash and cash equivalents and restricted cash, end of period Total cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents United States UNITED STATES Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Sales, payroll and other taxes payable Taxes Payable, Current Shares reserved for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Interest and other expenses, net Interest Income (Expense), Nonoperating, Net Amortization expense for capitalized software Capitalized Computer Software, Amortization Entity Address, Postal Zip Code Entity Address, Postal Zip Code Schedule of Accrued Expenses and Other Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Issuance of common stock upon exercise of stock options (in shares) Options exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Weighted-average discount rate: Leases, Weighted Average Discount Rate [Abstract] Leases, Weighted Average Discount Rate Settlement liabilities Settlement Liabilities, Current Related party loan receivables Increase (Decrease) in Accounts Receivable, Related Parties Weighted-average number of diluted shares outstanding (in shares) Weighted-average shares of common stock used to compute net income (loss) per share attributable to common stockholders, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Lease liabilities, non-current Lease Liability, Non-Current Lease Liability, Non-Current Income Taxes Income Tax Disclosure [Text Block] Interest payable Interest Payable, Current Weighted-average shares of common stock used to compute net (loss) income per share attributable to Class A, LT10 and LT50 common stockholders: Denominator Weighted Average Number of Shares Outstanding, Basic [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Related Party [Domain] Related Party [Domain] Variable rate (as a percent) Debt Instrument, Basis Spread on Variable Rate Finance Lease, Right-of-Use Asset, Statement of Financial Position Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Lease right-of-use assets Right Of Use Assets Right Of Use Assets Schedule of Anti-dilutive Securities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Statement of Cash Flows [Abstract] Credit Facility [Axis] Credit Facility [Axis] Entity Address, Street Entity Address, Address Line One Net cash used by investing activities Net Cash Provided by (Used in) Investing Activities Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value General and administrative General and Administrative Expense [Member] Entity Shell Company Entity Shell Company Total current liabilities Liabilities, Current Class of Stock [Domain] Class of Stock [Domain] Credit card processing fees Accrued Credit Card Processing Fees, Current Accrued Credit Card Processing Fees, Current Defined Contribution Plan [Table] Defined Contribution Plan [Table] Expensify.Org Expensify.Org [Member] Expensify.Org Shares subject to repurchase related to stock options early exercised and not yet vested Stock Subject To Repurchase During Period Due to Early Exercised And Not Fully Vested, Value Stock Subject To Repurchase During Period Due to Early Exercised And Not Fully Vested, Value Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Operating cash flows from finance leases Finance Lease, Interest Payment on Liability Employer contribution (as a percent) (up to) Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Common Stock, LT50 Common Stock, LT50 [Member] Common Stock, LT50 Current Fiscal Year End Date Current Fiscal Year End Date Matching plan escrow Employee Stock Purchase Plan, Escrow Employee Stock Purchase Plan, Escrow Line of Credit Facility Line of Credit Facility [Line Items] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Remainder of 2022 Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Statement [Table] Statement [Table] Other current assets Other current assets Other Assets, Current Recent Accounting Pronouncements Adopted And Recent Accounting Pronouncements Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Other assets Increase (Decrease) in Other Noncurrent Assets Lease liabilities, current Lease Liability, Current Lease Liability, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Subsequent Event Subsequent Event [Member] Mortgages Mortgages [Member] Settlement liabilities Increase (Decrease) in Settlement Liabilities Increase (Decrease) in Settlement Liabilities Lease liabilities, non-current Finance Lease, Liability, Noncurrent Convertible preferred stock Preferred Stock [Member] Operating Lease, Right-of-Use Asset, Statement of Financial Position Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Rate differentials for controlled foreign corporations (CFCs) and charitable organizations Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Cost of revenue, net Cost of Sales [Member] Foreign Current Foreign Tax Expense (Benefit) Scenario [Domain] Scenario [Domain] Adjustments to reconcile net (loss) income to net cash provided (used) by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Operating lease cost Operating Lease, Cost Computers and equipment Computer Equipment [Member] Accrued expenses and other liabilities Accrued expenses and other liabilities Accounts Payable and Other Accrued Liabilities, Current RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Employer share match rate (as a percent) Share-Based Compensation Arrangement By Share-Based Payment Award, Percentage Of Shares Matched By Employer Share-Based Compensation Arrangement By Share-Based Payment Award, Percentage Of Shares Matched By Employer