Document And Entity Information Statistical Measurement [Axis] Note To Financial Statement Details Textual Significant Accounting Policies Note 1 - Basis of Presentation us-gaap_IncomeTaxExpenseBenefit Income tax expense ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note 3 - Accrued Expenses ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Note 4 - Loans Trading Arrangements, by Individual [Table] Note 6 - Net Income (Loss) Per Share Material Terms of Trading Arrangement [Text Block] Note 7 - Income Taxes Revenue from Contract with Customer Benchmark [Member] Note 10 - Segment Reporting Tax Year 2020 [Member] Note 1 - Basis of Presentation - Schedule of Disaggregation of Revenue (Details) us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares) Note 3 - Accrued Expenses - Summary of Accrued Expenses (Details) Long-Lived Asset, Including Intangible Asset and Goodwill, Impairment and Disposal [Policy Text Block] Note 4 - Loans - Schedule of Debt Maturity (Details) Minimum [Member] Note 6 - Net Income (Loss) Per Share - Earnings Per Share Reconciliation (Details) Note 6 - Net Income (Loss) Per Share - Anti-dilutive Securities (Details) Statistical Measurement [Domain] Note 7 - Income Taxes - Schedule of Net Operating Losses (Details) Maximum [Member] Note 7 - Income Taxes - Components of Income Tax Expense (Details) Note 7 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) Note 10 - Segment Reporting - Segment Reconciliation (Details) Note 10 - Segment Reporting - Reconciliation of Profit (Loss) (Details) us-gaap_IncreaseDecreaseInAccountsReceivable Accounts receivable Notes To Financial Statements Notes To Financial Statements [Abstract] Accounts payable and accrued expenses Business Description and Accounting Policies [Text Block] Change in valuation allowance, percent us-gaap_EffectiveIncomeTaxRateContinuingOperations Income tax expense (benefit), percent Income tax (benefit) at 21%, percent Income Tax Jurisdiction [Domain] Other income (expense): State taxes, percent us-gaap_IncreaseDecreaseInInventories Inventory us-gaap_SharesOutstanding Balance (in shares) Balance (in shares) Letter of Credit [Member] Segment Reporting [Text Block] Award Type [Axis] Segment Reporting [Table Text Block] Preferred stock, $0.01 par value, 10,000,000 shares authorized; -0- shares outstanding at March 31, 2026 (unaudited) and December 31, 2025 Adjustments to reconcile net income (loss) to net cash provided by operating activities: Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] us-gaap_Liabilities Total liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and stockholders’ equity us-gaap_AllocatedShareBasedCompensationExpense Stock-based compensation Segment Reporting [Table] us-gaap_IncreaseDecreaseInPrepaidExpense Prepaid expenses and other Selling, general and administrative expenses: Employee stock-based compensation SG&A SG&A Lessee, Lease, Description [Table] Reserve for processing losses usio_IncreaseDecreaseInReserveForProcessingLosses The increase (decrease) during the reporting period in the reserve for processing losses. Share-Based Payment Arrangement [Text Block] Common Stock Outstanding [Member] Represents common stock outstanding. Permanent and other differences, percent Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to permanent and other differences. Tax Year 2010 [Member] Tax Year 2008 [Member] Changes in current assets and current liabilities: Tax Year 2009 [Member] Tax Year 2006 [Member] Preferred stock, outstanding (in shares) Tax Year 2007 [Member] Preferred stock, authorized (in shares) Tax Year 2013 [Member] Preferred stock, par value (in dollars per share) us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Change in cash, cash equivalents, settlement processing assets, prepaid card load assets, customer deposits and merchant reserves us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents Cash, cash equivalents, settlement processing assets, prepaid card load assets, customer deposits and merchant reserves, beginning of period Cash, Cash Equivalents, Settlement Processing Assets, Prepaid Card Load Assets, Customer Deposits and Merchant Reserves, End of Period New Accounting Pronouncements, Policy [Policy Text Block] Concentration Risk, Credit Risk, Policy [Policy Text Block] Statement [Table] Credit Facility [Axis] Credit Facility [Domain] Revolving Credit Facility [Member] Right of use assets obtained in exchange for operating lease liabilities us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity Line of Credit Facility, Maximum Borrowing Capacity us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity Line of Credit Facility, Remaining Borrowing Capacity us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) Long-Term Debt, Type [Axis] Product and Service [Domain] Product and Service [Axis] us-gaap_LineOfCredit Long-Term Line of Credit Ownership [Axis] Ownership [Domain] us-gaap_PropertyPlantAndEquipmentUsefulLife Property, Plant and Equipment, Useful Life (Year) us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear 2026 (remainder of the year), amount due Debit Arrangement to Finance Purchase of Output Solutions Printer [Member] Debit Arrangement to Finance Purchase of Output Solutions Printer us-gaap_OperatingLeaseExpense Operating Lease, Expense Schedule of Maturities of Long-Term Debt [Table Text Block] Assets Services [Member[ Services Nature of Expense [Axis] Processing [Member] Processing Statement [Line Items] Postage [Member] Postage Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Common stock, issued (in shares) Award Type [Domain] Common stock, outstanding (in shares) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Common stock, authorized (in shares) Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Common stock, $0.001 par value, 200,000,000 shares authorized; 31,667,305 and 31,562,178 issued, and 27,672,168 and 27,729,704 outstanding at March 31, 2026 (unaudited) and December 31, 2025, respectively Tax Period [Domain] us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) Proceeds from issuance of common stock Tax Period [Axis] Accounts payable us-gaap_PolicyTextBlockAbstract Accounting Policies Current provision: Deferred provision: us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_TableTextBlock Notes Tables Employees and Directors [Member] Represents information pertaining to employees and directors. us-gaap_ProceedsFromLinesOfCredit Proceeds from Lines of Credit Legal Matters and Contingencies [Text Block] Accrued salaries Capital expenditures Concentration Risk Type [Axis] Accrued expenses Total accrued expenses Greg Carter [Member] Represents Greg Carter. Accrued commissions Operating lease liabilities, net of current portion Other accrued expenses Operating lease liabilities, current portion Equipment loan, current portion Concentration Risk Type [Domain] us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo 2028, amount due Equipment loan, net of current portion Tax Year 2017 [Member] us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour 2030, amount due us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree 2029, amount due us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths 2027, amount due Tax Year 2016 [Member] Income Tax Jurisdiction, Domestic Federal [Member] us-gaap_LongTermDebt Total payments Loss Contingencies [Table] Statement of Stockholders' Equity [Abstract] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Statement of Cash Flows [Abstract] Long-Term Debt, Type [Domain] Stockholders’ equity: Equity Components [Axis] Assets held for customers The amount of cash inflow (outflow) from assets held for sale. Operating lease liabilities Equity Component [Domain] Offsetting Liabilities [Table] Summary of Operating Loss Carryforwards [Table Text Block] Additional Paid-in Capital [Member] Retained Earnings [Member] Customer deposits usio_CustomerDepositsLiabilityCurrent Represents the amount of current liability recorded for customer deposits as of the balance sheet date. Cost of services Customer deposits Customer deposits Customer deposits Represents the current asset recorded for customer deposits as of the balance sheet date. Property and equipment, net Deferred tax asset, net Property, Plant, and Equipment [Policy Text Block] Debit Arrangement to Finance Purchase of Output Solutions Folder and Inserter [Member] Represents the debit arrangement to finance the purchase of Output Solutions folder and inserters. Customer deposits usio_IncreaseDecreaseInCustomerDepositsLiability Represents the amount of increase (decrease) during the period in the liability for customer deposits. Credit Card Origination Costs, Policy [Policy Text Block] usio_NumberOfMajorCustomers Number of Major Customers Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc. Deferred Compensation, Share-Based Payments [Member] Supplemental disclosure of cash flow information: Current liabilities: us-gaap_CurrentIncomeTaxExpenseBenefit Current Income Tax Expense (Benefit) us-gaap_LiabilitiesCurrent Total current liabilities Federal State Accounts receivable, net Tax Year 2019 [Member] Customer Concentration Risk [Member] Legal Costs, Policy [Policy Text Block] Employee Awards [Member] Related to employee awards. Warrants Issued to Acquire Information Management Solutions, LLC [Member] Represents information regarding warrants issued as part of the consideration for the acquisition of Information Management Solutions, LLC. Shareholders' Equity and Share-Based Payments [Text Block] usio_ClassOfWarrantOrRightIssuedDuringPeriod Class of Warrant or Right, Issued During Period (in shares) The number of warrants or rights issued during period. us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Income (loss) before income taxes Settlement processing assets Settlement processing assets Settlement processing assets Carrying amount as of the balance sheet date of the settlement processing assets that are expected to be liquidated within one year or the normal operating cycle, if longer. Additional paid-in capital Merchant reserves Merchant reserves Merchant reserves Carrying amount as of the balance sheet date of the merchant reserves, classified as current. Debt Disclosure [Text Block] usio_AssetsNoncurrentExcludingPropertyPlantAndEquipmentNet Total other assets Sum of the carrying amounts as of the balance sheet date of assets, excluding property, plant and equipment that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer. Officers, Directors, and Employees [Member] Represents officers, directors, and employees. Settlement processing obligations Carrying amount as of the balance sheet date of the settlement processing liabilities that are expected to be liquidated within one year or the normal operating cycle, if longer. usio_RepaymentsOfLongtermDebtAndInterest Repayments of Long-term Debt and Interest The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer and interest. Prepaid card load assets Prepaid card load assets Prepaid card load assets Amount of asset related to consideration paid in advance for card load assets that provides economic benefits within a future period of one year or the normal operating cycle, if longer. usio_ClassOfWarrantOrRightTermFollowingVesting Class of Warrant or Right, Term Following Vesting (Year) Represents the term of warrants or rights, beginning at the date of vesting. Use of Estimates, Policy [Policy Text Block] Prepaid expenses and other Blaise Bender [Member] Represents Blaise Bender. Houston Frost [Member] Represents Houston Frost. us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) Ernesto Beyer [Member] Represents Ernesto Beyer. Brad Rollins [Member] Represents Brad Rollins. us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchases of property and equipment Issuance of common stock under employee stock purchase plan Lessee, Operating Leases [Text Block] Issuance of common stock under equity incentive plan Michael White [Member] Represents Michael White. us-gaap_DebtInstrumentFaceAmount Debt Instrument, Face Amount Merchant reserve obligations Liability attributable to restricted cash that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date. Michelle Miller [Member] Represents Michelle Miller. Merchant Services [Member] Represents Merchant Services. us-gaap_AssetsCurrent Total current assets Identifiable assets Identifiable assets is calculated by summing the balances of accounts receivable, net; inventories; property and equipment,net; net right-of-use lease assets; and intangibles. Issuance of common stock under equity incentive plan (in shares) Segment Profit Gross profit Gross profit Issuance of common stock under employee stock purchase plan (in shares) Restricted Stock Units (RSUs) [Member] Prepaid card load obligations Represents the amount of prepaid card load liabilities, classified as current. usio_SharesWithheldPricePerShare Shares Withheld, Price Per Share (in dollars per share) The price per share of shares withheld. us-gaap_DebtInstrumentInterestRateStatedPercentage Debt Instrument, Interest Rate, Stated Percentage Related and Nonrelated Parties [Axis] usio_IncreaseDecreaseInRestrictedCashAndCashEquivalentsCurrentOperatingActivities Merchant reserves Amount of increase (decrease) in restricted cash and cash equivalents during the period. Deferred compensation amortization Represents the amount of amortization of deferred compensation. Prepaid Card Load Assets, Policy [Policy Text Block] Disclosure of accounting policy for prepaid card load assets. ACH and Complementary Service Revenue [Member] Information pertaining to ACH and complementary service revenue. us-gaap_DebtInstrumentPeriodicPaymentInterest Debt Instrument, Periodic Payment, Interest usio_IncreaseDecreaseInOperatingLeaseRightOfUseAsset Operating lease right-of-use assets Amount of increase (decrease) in operating lease, right of use asset during the period. us-gaap_DebtInstrumentPeriodicPayment Debt Instrument, Periodic Payment Schedule of Long-Term Debt Instruments [Table] Prepaid Card Services Interest Revenue [Member] Represents information pertaining to prepaid card services interest revenue. Output Solutions Interest [Member] Represents output solutions interest revenue. Credit Card Revenue [Member] Information pertaining to credit card revenue. Prepaid Card Services Revenue [Member] Information pertaining to prepaid card services revenue. ACH and Complementary Service Interest Revenue [Member] Represents information pertaining to interest revenue for ACH and complementary service revenue. Operating activities: Investing activities: us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash provided by operating activities Financing activities: us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash used in investing activities us-gaap_SharesIssuedPricePerShare Shares Issued, Price Per Share (in dollars per share) us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash provided by (used in) financing activities Commitments and Contingencies, Policy [Policy Text Block] Non Employee Directors [Member] Represents non employee directors. Accounting Policies [Abstract] Segments [Domain] us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent Accounts Receivable, Allowance for Credit Loss, Current us-gaap_DeferredCompensationEquity Deferred compensation Receivable [Policy Text Block] Segments [Axis] Measurement Input Type [Axis] Louis Hoch [Member] Information pertaining to Louis Hoch. Federal income tax Income Statement [Abstract] us-gaap_NumberOfReportableSegments Number of Reportable Segments Deferred federal income tax Measurement Input, Expected Dividend Rate [Member] Measurement Input, Expected Term [Member] Angry Pug Sportswear [Member] Information pertaining to Angry Pug Sportswear. us-gaap_TreasuryStockCommonValue Treasury stock, at cost; 3,995,137 and 3,832,474 shares at March 31, 2026 (unaudited) and December 31, 2025, respectively usio_OwnershipPercentage Ownership Percentage Represents the percentage of ownership. Treasury stock, shares (in shares) us-gaap_FairValueAdjustmentOfWarrants Fair Value Adjustment of Warrants Treasury Stock, Common [Member] Net income (loss) Net loss for the period Net income (loss) Net income for the period Measurement Input, Price Volatility [Member] us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic Numerator for basic and diluted income (loss) per share, net income (loss) available to common shareholders Permanent and other differences Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to utilization of net operating loss carryforwards. State income tax expense Measurement Input, Share Price [Member] Measurement Input Type [Domain] Federal income tax expense Measurement Input, Risk Free Interest Rate [Member] us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Income Tax Disclosure [Text Block] us-gaap_WarrantsAndRightsOutstandingMeasurementInput Warrants and Rights Outstanding, Measurement Input Restricted Stock [Member] Accounting Standards Update and Change in Accounting Principle [Table] us-gaap_DeferredTaxAssetsLiabilitiesNet Deferred Tax Assets, Net Income Tax, Policy [Policy Text Block] Income tax (benefit) at 21% us-gaap_AssetImpairmentCharges Asset Impairment Charges Related and Nonrelated Parties [Domain] us-gaap_TreasuryStockValueAcquiredCostMethod Purchase of treasury stock, at cost Related Party Transaction [Table] Related Party Transactions Disclosure [Text Block] State taxes us-gaap_ValuationAllowancesAndReservesDeductions SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction us-gaap_RepaymentsOfLongTermDebt Payments on equipment loan us-gaap_RepaymentsOfLinesOfCredit Repayments of Lines of Credit Reserve for processing losses Statement of Financial Position [Abstract] Adjustment to par value of common stock Represents the equity impact of adjustment to par value of common stock during the period. Income taxes us-gaap_IncomeTaxesPaidNet Tax Year 2018 [Member] Non-current liabilities: Other assets us-gaap_PaymentsForRepurchaseOfCommonStock Purchases of treasury stock us-gaap_WarrantsAndRightsOutstanding Warrants and Rights Outstanding Document Type Document Information [Line Items] Document Quarterly Report Document Information [Table] Anti-dilutive warrants (in shares) Effect of dilutive securities (in shares) us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment Entity Interactive Data Current Document Transition Report Diluted (in shares) Denominator for diluted earnings per share, adjusted for weighted average shares and assumed conversion (in shares) us-gaap_OperatingExpenses Total selling, general and administrative Denominator for basic income (loss) per share, weighted average shares outstanding (in shares) Basic (in shares) us-gaap_DebtInstrumentTerm Debt Instrument, Term (Month) Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Antidilutive Security, Excluded EPS Calculation [Table] Basic income (loss) per common share (in dollars per share) Basic income (loss) per common share: (in dollars per share) Effective Income Tax Rate Reconciliation [Table] Tax Year 2022 [Member] Income Tax Jurisdiction [Axis] Intangibles, net Document Fiscal Period Focus Document Fiscal Year Focus Depreciation and amortization Depreciation and amortization Amendment Flag Document Period End Date Legal Entity [Axis] Entity File Number Entity Tax Identification Number Disaggregation of Revenue [Table Text Block] Entity [Domain] Entity Central Index Key Entity Registrant Name Entity Current Reporting Status Entity Incorporation, State or Country Code Current Fiscal Year End Date Fair Value Measurement, Policy [Policy Text Block] Entity Filer Category Entity Shell Company Entity Emerging Growth Company Entity Small Business us-gaap_OperatingIncomeLoss Operating income (loss) NOL Operating Loss Carryforwards Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Entity Address, State or Province Entity Address, City or Town us-gaap_InterestExpenseNonoperating Interest expense Accumulated deficit Entity Address, Address Line One City Area Code Local Phone Number Entity Address, Postal Zip Code Title of 12(b) Security Security Exchange Name Trading Symbol Class of Stock [Axis] Revenue [Policy Text Block] Entity Common Stock, Shares Outstanding usio_PolicyTable Earnings Per Share [Text Block] us-gaap_PaymentsForSoftware Capitalized labor for internal use software Weighted average common shares outstanding us-gaap_CapitalizedComputerSoftwareAdditions Capitalized Computer Software, Additions Denominator: Accrued taxes Tax Years Before 2018 [Member] Relating to tax years before 2018. Tax Years Starting in 2018 [Member] Relating to tax years starting in 2018. Common stock, par value (in dollars per share) us-gaap_OtherNonoperatingIncome Other income, net Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] us-gaap_Assets Total assets Cash and Cash Equivalents, Policy [Policy Text Block] Cash and cash equivalents Cash and cash equivalents Cash and cash equivalents us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty Related Party Transaction, Purchases from Related Party usio_NetOperatingLossNotSubjectToExpiration Net Operating Loss Not Subject to Expiration Amount of operating loss that are not subject to expiration. Diluted income (loss) per common share and common share equivalent (in dollars per share) Diluted income (loss) per common share: (in dollars per share) Depreciation and Amortization us-gaap_DepreciationDepletionAndAmortization Output Solutions [Member] Represents output solutions. us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation usio_IncreaseDecreaseInAccountsReceivableTaxCredit Accounts receivable, tax credit The increase (decrease) during the reporting period in the tax credit from the amount due within one year (or one business cycle) from customers for the credit sale of goods and services. Customer Deposits [Policy Text Block] Disclosure of accounting policy for customer deposits. Tax Year 2025 [Member] Software, Internal-Use [Policy Text Block] Interest income Interest us-gaap_InterestPaidNet Interim Period, Costs Not Allocable [Domain] Other assets: Inventory us-gaap_StockholdersEquity Total stockholders’ equity Balance Balance Stock, Class of Stock [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Operating lease right-of-use assets ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] Revenues Revenues ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] Inventory, Policy [Policy Text Block] Commitments and contingencies (Note 11) Change in valuation allowance