Document And Entity Information
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Note To Financial Statement Details Textual
Significant Accounting Policies
Schedule II - Valuation and Qualifying Accounts
Note 2 - Business Combination, Acquisitions and Divestiture
Risk-free interest rate
Note 3 - Inventory
Note 4 - Property, Plant and Equipment, Net
Note 5 - Goodwill and Other Intangible Assets
Note 6 - Accrued Liabilities
Note 7 - Debt
Note 10 - Fair Value Measurements
Expected dividend
Note 11 - Revenue
Note 12 - Income Taxes
Note 13 - Earnings Per Share
Note 14 - Benefit Plans
Expected volatility
Note 15 - Equity-based Compensation Plans
us-gaap_LiabilitiesCurrent
Total current liabilities
Note 16 - Lease Commitments
Note 17 - Major Reseller Customers
Note 18 - Acquisition, Restructuring and Management Fee Costs
Note 19 - Commitments and Contingencies
Weighted-average expected term (Year)
Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details)
Note 2 - Business Combination, Acquisitions, and Divestiture - Summary of Reconciles Elements of Business Combination to Cash Flows (Details)
Note 2 - Business Combination, Acquisitions, and Divestiture - Summary of Reconciles Elements of Business Combination to Cash Flows (Details) (Parentheticals)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Note 2 - Business Combination, Acquisitions, and Divestiture - Allocation of the Purchase Price to the Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details)
Note 2 - Business Combination, Acquisitions, and Divestiture - Summary of Pro Forma Information (Details)
Note 3 - Inventory - Schedule of Inventory (Details)
Note 4 - Property, Plant and Equipment, Net - Schedule of Property, Plant, and Equipment (Details)
Note 4 - Property, Plant and Equipment, Net - Schedule of Long-lived Assets by Geographic Locations (Details)
Note 5 - Goodwill and Other Intangible Assets - Schedule of Goodwill (Details)
Note 5 - Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details)
Note 5 - Goodwill and Other Intangible Assets - Schedule of Finite-lived Intangible Assets, Future Amortization Expense (Details)
Note 6 - Accrued Liabilities - Accrued Liabilities (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)
us-gaap_OtherOperatingIncomeExpenseNet
Other operating expense
Note 7 - Debt - Schedule of Debt (Details)
Note 7 - Debt - Future Maturities of Long-term Debt and Amortization of Debt Issuance Cost (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Vested, weighted average grant date fair value (in dollars per share)
Note 10 - Fair Value Measurements - Schedule of Value Assets and Liabilities Measured on Recurring Basis (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
Forfeited, weighted average grant date fair value (in dollars per share)
Note 10 - Fair Value Measurements - Summary of Assumptions for Estimated Fair Value Using Monte Carlo Simulation Model (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Balance on December 31, 2022 (in dollars per share)
Balance on December 31, 2023 (in dollars per share)
Note 10 - Fair Value Measurements - Reconciliation of Changes (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Forfeited, shares (in shares)
Note 11 - Revenue - Summary of Revenue by Product Category (Details)
Note 11 - Revenue - Summary of Revenue Based on Geographic Location (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Balance on December 31, 2022 (in shares)
Balance on December 31, 2023 (in shares)
Note 12 - Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details)
Current portion of long-term debt
Note 12 - Income Taxes - Schedule of Income Before Income Tax, Domestic and Foreign Jurisdictions (Details)
Note 12 - Income Taxes - Schedule of Provision and Effective Tax Rates (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)
Note 12 - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)
Vested, shares (in shares)
Note 12 - Income Taxes - Change in the Valuation Allowance for Deferred Tax Assets (Details)
Note 12 - Income Taxes - Changes in Unrecognized Tax Benefits (Details)
Note 13 - Earnings Per Share - Schedule of Basic and Diluted Earning Per Share (Details)
us-gaap_LongTermDebtCurrent
Less current portion of long-term debt
Note 13 - Earnings Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details)
Note 14 - Benefit Plans - Summary of Changes in the Benefit Obligation and Plan Assets and the Plan Funded Status (Details)
Note 14 - Benefit Plans - Schedule of Pre Tax Amounts Recognized in Other Comprehensive Income (Details)
Note 14 - Benefit Plans - Summarizes the Components of Net Periodic Benefit Cost (Details)
Note 14 - Benefit Plans - Schedule of Defined Benefit Plan, Assumptions (Details)
Note 15 - Equity-based Compensation Plans - Summary of Restricted Stock Units Activity (Details)
Note 15 - Equity-based Compensation Plans - Schedule of Share-Based Payment Award Equity Instruments Other Than Options Valuation Using Black-Scholes Option Pricing Model (Details)
Options exercisable, weighted average exercise price (in dollars per share)
Note 15 - Equity-based Compensation Plans - Summary of Stock Option Activity (Details)
Options exercisable, weighted average remaining contractual term (Year)
Note 15 - Equity-based Compensation Plans - Schedule of Share-Based Payment Award Stock Options Valuation Using Black-Scholes Option Pricing Model (Details)
Options exercisable, aggregate intrinsic value
Note 15 - Equity-based Compensation Plans - Schedule of Profit Interest Units Valuation using Black-Scholes Option Pricing Model (Details)
Note 15 - Equity-based Compensation Plans - Schedule of Components of Equity-based Compensation Expense (Details)
Interest Rate Contract [Member]
Note 16 - Lease Commitments - Schedule of Operating Lease Assets and Obligations (Details)
Note 16 - Lease Commitments - Schedule of Operating Lease Expense Supplemental Cash Flow Information (Details)
Note 16 - Lease Commitments - Schedule of Future Minimum Rental Payments for Operating Leases (Details)
Options exercisable, shares (in shares)
Note 17 - Major Reseller Customers - Schedules of Concentration of Risk (Details)
Note 18 - Acquisition, Restructuring and Management Fee Costs - Summary of Total Acquisitions and Restructuring Costs (Details)
Options outstanding, weighted average remaining contractual term (Year)
Note 19 - Commitments and Contingencies - Schedule of Accrual For Product Warranties (Details)
Options outstanding, aggregate intrinsic value
Notes To Financial Statements
Notes To Financial Statements [Abstract]
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Option, Nonvested, Weighted Average Exercise Price, Ending Balance (in dollars per share)
Financial Instruments [Domain]
Accrued Liabilities [Member]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options outstanding, weighted average exercise price (in dollars per share)
Options outstanding, weighted average exercise price (in dollars per share)
Forfeited, weighted average exercise price (in dollars per share)
Expired, weighted average exercise price (in dollars per share)
Financial Instrument [Axis]
Accrued liabilities
Total accrued liabilities
us-gaap_AccruedIncomeTaxesCurrent
Accrued taxes
us-gaap_InterestPayableCurrent
Accrued interest
Lessee, Operating Leases [Text Block]
Accounts payable
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options outstanding, shares (in shares)
Options outstanding, shares (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod
Expired, shares (in shares)
us-gaap_AccruedEmployeeBenefitsCurrent
Accrued employee compensation and benefits
us-gaap_OtherAccruedLiabilitiesCurrent
Accrued other
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)
LIABILITIES AND STOCKHOLDERS' EQUITY
Vesting [Axis]
Vesting [Domain]
us-gaap_Assets
Total assets
Restructuring, Impairment, and Other Activities Disclosure [Text Block]
Plan Name [Axis]
Shareholders' Equity and Share-Based Payments [Text Block]
Plan Name [Domain]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Award Type [Domain]
hlly_SharebasedCompensationArrangementEquityInstrumentsOtherThanOptionsTimebasedAwards
Share-based Compensation Arrangement, Equity Instruments Other Than Options, Time-based Awards (in shares)
The number of equity instruments of than options that are time-based awards.
Award Type [Axis]
Finite-Lived Intangible Assets, Accumulated Amortization
Finite-Lived Intangible Assets, Net
Total
Other intangibles assets, net
Finite-Lived Intangible Assets, Gross
Private and Public Warrants [Member]
Represents private and public warrants.
Tradenames
us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Commitments and Contingencies Disclosure [Text Block]
Less: accumulated depreciation
Property, plant, and equipment, net
Property, Plant and Equipment, Net
Property, plant and equipment, net
Goodwill
Goodwill
Balance
Balance
Property, Plant, and Equipment, Gross
Derivative Instrument [Axis]
Derivative Contract [Domain]
Letter of Credit [Member]
Income tax expense
Total income tax expense
us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal
Management fees (3)
us-gaap_OperatingExpenses
Total operating expense
us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Defined Contribution Plan, Employer Discretionary Contribution Amount
us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Fair value of plan net assets
Fair value of plan net assets
Funded status at end of period
us-gaap_DefinedBenefitPlanBenefitObligation
Benefit obligation
Benefit obligation
us-gaap_DefinedBenefitPlanContributionsByEmployer
Defined Benefit Plan, Plan Assets, Contributions by Employer
hlly_FdicDepositsMaturities
FDIC Deposits Maturities (Year)
Represents FDIC deposits maturities.
Amendment Flag
City Area Code
Use of Estimates, Policy [Policy Text Block]
hlly_OutstandingTermOfTheEarnoutShare
Outstanding Term of the Earn-out Share (Year)
Outstanding term of the earn-out share.
us-gaap_GainLossOnSaleOfBusiness
Loss on sale of business
New Accounting Pronouncements, Policy [Policy Text Block]
Reclassification, Comparability Adjustment [Policy Text Block]
us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Loss (gain) on disposal of property, plant and equipment
Expected return on plan assets
us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets
Current Fiscal Year End Date
Discount rate
us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
Reseller Customers [Member]
Represents reseller customers.
us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
Defined Benefit Plan, Accumulated Benefit Obligation
Document Fiscal Period Focus
Document Fiscal Year Focus
Document Period End Date
Entity File Number
Entity Ex Transition Period
Entity Emerging Growth Company
Document Type
us-gaap_GainsLossesOnExtinguishmentOfDebt
Gain (Loss) on Extinguishment of Debt
Loss (gain) on early extinguishment of long-term debt
Entity Small Business
us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
Actual return on plan assets
Entity Shell Company
us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant
us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid
Benefits paid from plan assets
us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
Settlement loss recognized
Document Information [Line Items]
Document Information [Table]
us-gaap_DefinedBenefitPlanSettlementsPlanAssets
Plan settlements
Entity Public Float
us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid
Benefits paid
Entity Filer Category
Entity Current Reporting Status
Entity Voluntary Filers
Acquisitions (1)
Entity Well-known Seasoned Issuer
us-gaap_DefinedBenefitPlanActuarialGainLoss
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)
Actuarial (gain) loss
us-gaap_DefinedBenefitPlanSettlementsBenefitObligation
Plan curtailments
Impairment of indefinite-lived intangible assets
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)
us-gaap_GoodwillImpairmentLoss
Goodwill, Impairment Loss
Concentration risk, percentage
Concentration Risk, Percentage
Entity Tax Identification Number
Entity Central Index Key
Entity Registrant Name
Entity [Domain]
Customer Concentration Risk [Member]
Legal Entity [Axis]
Entity Address, Address Line One
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Amortization of intangible assets
Entity Address, City or Town
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Entity Address, Postal Zip Code
Entity Address, State or Province
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Concentration Risk Type [Axis]
Material Terms of Trading Arrangement [Text Block]
Concentration Risk Type [Domain]
Entity Common Stock, Shares Outstanding
us-gaap_AdvertisingExpense
Advertising Expense
Revenue Benchmark [Member]
Accounts Receivable [Member]
Trading Symbol
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Local Phone Number
us-gaap_TableTextBlock
Notes Tables
Selling, general, and administrative
Provision for credit losses
Research and development costs
Charged against allowances
The amount of charges against valuation allowances and reserves.
us-gaap_InterestExpense
Interest expense, net
SEC Schedule, 12-09, Allowance, Cash Discount Reserve [Member]
Related to allowance for cash discount reserve.
Amortization of deferred loan costs
Amortization of Debt Issuance Costs
hlly_ResearchDevelopmentPreProductionAndStartUpCosts
Research, Development, Pre Production and Start Up Costs
Research, development, pre production and start up costs.
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Inventory Disclosure [Text Block]
Schedule of Inventory, Current [Table Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Thereafter
Equity compensation
us-gaap_EmployeeBenefitsAndShareBasedCompensation
Fair Value Measurement, Policy [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2025
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2026
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2027
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
2028
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Segment Reporting, Policy [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2024
SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain]
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Self Insurance Reserve [Policy Text Block]
Lessee, Leases [Policy Text Block]
SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis]
us-gaap_FiniteLivedIntangibleAssetUsefulLife
Finite-Lived Intangible Asset, Useful Life (Year)
Earnings Per Share, Policy [Policy Text Block]
Comprehensive Income, Policy [Policy Text Block]
Income Tax, Policy [Policy Text Block]
Research and Development Expense, Policy [Policy Text Block]
us-gaap_SharesIssuedPricePerShare
Shares Issued, Price Per Share (in dollars per share)
Schedule of Elements of Business Combination to Cash Flows [Table Text Block]
Schedule of elements of business combination to cash flows table text block.
Cash - Forward Purchase Agreement
Proceeds from forward purchase agreement.
Cash - PIPE Financing
Proceeds from PIPE financing.
us-gaap_AssetsCurrent
Total current assets
Share-Based Payment Arrangement [Policy Text Block]
hlly_NetCashProceedsFromBusinessCombinationAndPIPEFinancing
Net cash provided by Business Combination and PIPE Financing
Net cash proceeds from business combination and PIPE Financing.
hlly_NetContributionsFromBusinessCombinationAndPIPEFinancing
Net contributions from Business Combination and PIPE Financing
Net contributions from business combination and PIPE financing.
Empowers trust and cash redemptions
Payments for redemption of common stock.
us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
Impairment of Intangible Assets (Excluding Goodwill), Total
Selling, General and Administrative Expenses, Policy [Policy Text Block]
Advertising Cost [Policy Text Block]
Additions charged to expense accounts
us-gaap_DeferredTaxAssetsValuationAllowance
Valuation allowance
Valuation allowance, January 1
Valuation allowance, December 31
Summary of Valuation Allowance [Table Text Block]
2028, debt issuance costs amortization
Amortization of debt issuance Costs year Five
us-gaap_DeferredTaxAssetsNet
Total gross deferred tax assets, net of valuation allowance
Debt, Policy [Policy Text Block]
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]
Other
us-gaap_DeferredTaxAssetsOther
Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block]
us-gaap_DeferredTaxAssetsGross
Total gross deferred tax assets
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
us-gaap_DeferredIncomeTaxLiabilities
Total gross deferred tax liabilities
Inventory
Inventory, Net
Work-in-process
us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
Revenue from Contract with Customer, Including Assessed Tax
Revenue from External Customers by Products and Services [Table Text Block]
us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Gain (Loss), Foreign Currency Transaction, before Tax
Finished goods
Raw materials
us-gaap_PropertyPlantAndEquipmentUsefulLife
Property, Plant and Equipment, Useful Life (Year)
Construction in Progress [Member]
Accounts receivable, less allowance for credit losses of $1,577 and $1,550, respectively
Accounts Receivable, Allowance for Credit Loss, Current
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Building and Building Improvements [Member]
Land [Member]
Property, Plant and Equipment, Policy [Policy Text Block]
Long-Lived Tangible Asset [Axis]
us-gaap_NonoperatingIncomeExpense
Total non-operating expense (income)
Long-Lived Tangible Asset [Domain]
Net operating losses
us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Section 174 expenses
us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
Deferred Tax Assets, Operating Loss Carryforwards, State and Local
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Beginning of period
End of period
Inventory, Policy [Policy Text Block]
ASSETS
IPO [Member]
Deferred tax assets:
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net change in cash and cash equivalents
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash (used in) provided by financing activities
Sale of Stock [Axis]
Sale of Stock [Domain]
Effect of foreign currency rate fluctuations on cash
Executive Officer [Member]
us-gaap_OperatingIncomeLoss
Operating income
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash provided by operating activities
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
us-gaap_DeferredTaxLiabilities
Net deferred tax liabilities
Goodwill
us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill
hlly_EffectiveIncomeTaxRateReconciliationTransactionCosts
Transaction costs
The transaction costs for effective income tax rate reconciliation.
Intangible assets
us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
Cost of goods sold
Derivatives, Reporting of Derivative Activity [Policy Text Block]
us-gaap_GrossProfit
Gross profit
Permanent tax differences
Permanent tax differences.
hlly_EarnOuts
Earn-outs
Earn-outs.
Change in fair value of Warrants
Tax Effects of Fair Value Adjustment of Warrants.
Provision for inventory reserves
Right-of-use asset
us-gaap_DeferredTaxLiabilitiesLeasingArrangements
Liabilities not yet deductible
hlly_DeferredTaxAssetsLiabilitiesNotYetDeductible
The amount of deferred tax assets from liabilities not yet deductible.
Interest expense limitation
hlly_DeferredTaxAssetsInterestExpenseLimitation
The amount of deferred tax assets from interest expense limitation.
Tradename
hlly_DeferredTaxLiabilitiesTradename
The amount of deferred tax liabilities from tradename.
us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities
Payment of acquisition contingent consideration
Reserves on assets
hlly_DeferredTaxAssetsReservesOnAssets
The amount of deferred tax assets from reserves on assets.
Concentration Risk, Credit Risk, Policy [Policy Text Block]
hlly_DefinedBenefitPlanPlanAssetsExpensesPaid
Expenses paid
Defined benefit plan plan assets expenses paid.
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Payments from stock-based award activities
Property, plant and equipment
us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
hlly_DefinedBenefitPlanBenefitObligationExpensesPaid
Expenses paid
Defined benefit plan benefit obligation expenses paid.
Deferred tax liabilities:
hlly_AcceleratedSharebasedPaymentArrangementExpense
Accelerated Share-Based Payment Arrangement, Expense
The amount of accelerated share-based payment arrangement expense.
Sentinel Capital Partners [Member]
Related to Sentinel Capital Partners.
Shareholders Equity [Member]
Related to shareholders equity.
President [Member]
Customer A [Member]
Related to Customer A.
hlly_AcquisitionCostsAndManagementFees
Acquisition Costs and Management Fees
The amount of acquisition costs and management fees.
Proceeds from issuance of common stock in connection with the exercise of Warrants
Net sales
us-gaap_ProceedsFromIssuanceOfCommonStock
Proceeds from Issuance of Common Stock
Title of Individual [Domain]
us-gaap_CurrentStateAndLocalTaxExpenseBenefit
State
Title of Individual [Axis]
us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
State
us-gaap_CurrentForeignTaxExpenseBenefit
Foreign
us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Foreign
us-gaap_CurrentFederalTaxExpenseBenefit
Federal
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Federal
us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued
Income Tax Examination, Penalties and Interest Accrued
Deferred income tax expense (benefit):
Current income tax expense:
us-gaap_CurrentIncomeTaxExpenseBenefit
Total current income tax expense
Global intangible low-taxed income
Foreign
us-gaap_EffectiveIncomeTaxRateReconciliationFdiiAmount
Foreign-derived intangible income deduction
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income (loss) before income taxes
United States
us-gaap_PaymentsOfFinancingCosts
Deferred financing fees
ICFR Auditor Attestation Flag
State and Local Jurisdiction [Member]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Domestic Tax Authority [Member]
us-gaap_RepaymentsOfLongTermDebt
Repayments of Long-Term Debt, Total
Principal payments on long-term debt
us-gaap_AccountsReceivablePurchase
Accounts Receivable, Purchase
Revenue from Contract with Customer [Text Block]
Accounts Receivable [Policy Text Block]
Defined Benefit Plan [Text Block]
Cash and Cash Equivalents, Policy [Policy Text Block]
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits
Gross unrecognized tax benefits, January 1
Gross unrecognized tax benefits, December 31
us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Accounting Policies [Abstract]
us-gaap_EarlyRepaymentOfSeniorDebt
Early Repayment of Senior Debt
Basis of Accounting, Policy [Policy Text Block]
Concentration Risk Disclosure [Text Block]
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
Changes in balance related to tax position taken during prior periods
Proceeds from issuance of long-term debt
hlly_AccruedFreightCurrent
Accrued freight
Carrying value as of the balance sheet date of freight. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).
hlly_AccruedReturnsAndAllowancesCurrent
Accrued returns, allowances and warranties
Represents current accrued returns and allowance.
Auditor Name
Auditor Firm ID
Auditor Location
hlly_DebtInstrumentCovenantMinimumLiquidity
Debt Instrument, Covenant, Minimum Liquidity
Represents minimum liquidity for debt instrument covenant.
us-gaap_SharePrice
Share Price (in dollars per share)
Acquisition and restructuring costs
Acquisition And Restructuring Costs.
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)
Related party acquisition and management fee costs
Related Party Acquisition and Management Fee Costs
Weighted average common shares outstanding - diluted (in shares)
Weighted average common shares outstanding - diluted (in shares)
Warrant liability
Warrant Liability
Represent warrant liability.
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
Issuance of vested Earn-Out Shares
Issuance of earn-out shares
Statement of Financial Position [Abstract]
Diluted net income (loss) per share (in dollars per share)
Issuance of vested Earn-Out Shares (in shares)
Issuance of earn-out shares, Shares.
Weighted average common shares outstanding - basic (in shares)
Business Acquisition [Axis]
Basic net income (loss) per share (in dollars per share)
Business Acquisition, Acquiree [Domain]
Empower Sponsor Holdings LLC [Member]
Represents information regarding Empower Sponsor Holdings LLC.
Statement of Cash Flows [Abstract]
hlly_IncreaseDecreaseInPrepaidsAndOtherCurrentAssets
Prepaids and other current assets
Represents the increase or decrease in prepaids and other current assets.
Holley Parent Holdings Llc [Member]
Information about Holley Parent Holdings Llc business combination.
Statement of Stockholders' Equity [Abstract]
Revenue from External Customers by Geographic Areas [Table Text Block]
us-gaap_LesseeOperatingLeaseRemainingLeaseTerm
Lessee, Operating Lease, Remaining Lease Term (Year)
Long-Lived Assets by Geographic Areas [Table Text Block]
Schedule of Accrued Liabilities [Table Text Block]
Merger Agreement [Member]
Name of agreement.
hlly_BusinessCombinationContingentConsiderationSharesIssuableShares
Business Combination Contingent Consideration Shares Issuable, Shares (in shares)
Business Combination Contingent Consideration Shares Issuable Shares.
Transaction costs
Finspeed Llc [Member]
Information about Finspeed Llc.
Recapitalization transaction, net
Stock issued in period value, recapitalization transaction net.
hlly_BusinessCombinationIntangibleAssetsIncludingGoodwillAcquired
Business Combination Intangible Assets Including Goodwill Acquired
Business Combination Intangible Assets Including Goodwill Acquired.
Recapitalization transaction, net (in shares)
Stock issued in period, shares, recapitalization transaction, net.
Baer Inc [Member]
Information about Baer Inc Member.
Assumption of warrant liability
Assumption of warrant liability.
Brothers Mail Order Industries Inc [Member]
Information about Brothers Mail Order Industries Inc.
Assumption of earn-out liability
Assumption of earn out liability.
us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Johns Acquisition [Member]
Information about Johns acquisition.
Advance Engine Management Inc [Member]
Information about Advance Engine Management Inc.
Proceeds from Business Combination and PIPE financing, net of issuance costs paid
Proceeds from business combination and financing net of issuance costs paid.
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
hlly_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccrued
Accrued liabilities
Business combination recognized identifiable assets acquired and liabilities assumed current liabilities accrued.
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
hlly_DebtInstrumentWithdrawnAmount
Debt Instrument, Withdrawn Amount
Debt Instrument Withdrawn Amount.
Type of Restructuring [Domain]
First Lien Note Due November 17, 2028 [Member]
Information about the first lien note.
Employee Severance [Member]
Restructuring Type [Axis]
Other differences, net
FINANCING ACTIVITIES:
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
2027, debt issuance costs amortization
Amortization of Debt Issuance Costs Year Four.
Warrant Liability [Text Block]
Disclosure of warrant liability.
us-gaap_PaymentsForProceedsFromHedgeInvestingActivities
Payments for (Proceeds from) Hedge, Investing Activities
Public Warrants [Member]
Represents public warrants.
2024, debt issuance costs amortization
Amortization of debt issuance costs year one.
2025, debt issuance costs amortization
Amortization of debt issuance costs year two.
2026, debt issuance costs amortization
Amortization of debt issuance costs year three.
Pipe Investors [Member]
Information about pipe investors.
Subscription Agreement [Member]
information about subscription agreement.
Private Placement Warrants [Member]
Represents private placement warrants.
Proceeds from sale of business
Proceeds from Divestiture of Businesses
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net
Pledged Status [Domain]
Pledged Status [Axis]
Amortization of right of use assets
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Cash paid for acquisitions, net
Class of Stock [Axis]
Class of Stock [Domain]
Cash - Empower's trust and cash (net of redemptions of $99,353 and transaction costs of $44,314)
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
us-gaap_PaymentsToAcquireBusinessesGross
Payments to Acquire Businesses, Gross
Less: cash consideration paid to Holley Stockholder
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
Accounts payable
us-gaap_IncomeTaxReconciliationTaxCredits
Tax credit
State income tax expense (benefit)
Foreign rate differential
Property, plant and equipment
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Intangible assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap_DerivativeNotionalAmount
Derivative, Notional Amount
Expected tax expense (benefit) at U.S. Federal statutory rates
Accounts receivable
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
Income Tax Disclosure [Text Block]
Other assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
Hedging Designation [Axis]
Cash
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Hedging Designation [Domain]
Inventory
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
Designated as Hedging Instrument [Member]
Schedule of Maturities of Long-Term Debt [Table Text Block]
Schedule of Debt [Table Text Block]
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
Schedule of Net Benefit Costs [Table Text Block]
Pro forma net income
us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual
us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual
Business Acquisition, Pro Forma Information [Table Text Block]
Pro forma net sales
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]
Defined Benefit Plan, Assumptions [Table Text Block]
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
Retirement Plan Name [Axis]
Retirement Plan Name [Domain]
Goodwill and Intangible Assets Disclosure [Text Block]
Schedule of Goodwill [Table Text Block]
Pension Plan [Member]
Revolving Credit Facility [Member]
Proceeds from the disposal of fixed assets
Emerging Growth Company [Policy Text Block]
Emerging growth company.
Retirement Plan Type [Axis]
Risks And Uncertainties [Policy Text Block]
Risks and uncertainties.
Retirement Plan Type [Domain]
Warrant and Forward Purchase Agreement Liabilities [Policy Text Block]
Warrant and Forward Purchase Agreement Liabilities.
Credit Facility [Axis]
Credit Facility [Domain]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Amended And Restated Forward Purchase Agreement [Member]
Information about the amended and restated forward purchase agreement.
Trade Names [Member]
Vested Earn-Out Shares issued to Empower Sponsor Holdings LLC
Warrant Liability Private Placement Warrants [Member]
Information about Warrant Liability Private Placement Warrants.
Dilutive effect of potential common shares from Warrants (in shares)
Indefinite-Lived Intangible Assets [Axis]
Monte Carlo Simulation Model [Member]
Monte Carlo Simulation Model.
Indefinite-Lived Intangible Assets, Major Class Name [Domain]
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Capital expenditures
Dilutive effect of potential common shares from share-based payment arrangement (in shares)
Warrant Liability Public Warrants [Member]
Information about public warrants.
Earn Out Liability [Member]
Earn Out Liability.
Measurement Input Price Hurdle One [Member]
Measurement Input Price Hurdle One.
Measurement Input Strike Price [Member]
Measurement Input Strike Price Member.
Measurement Input Price Threshold [Member]
Measurement Input Price Threshold.
Cash paid for income taxes
Electronic Systems [Member]
Information about electronic systems.
Common Share Data:
Supplemental disclosures of cash flow information:
Patents [Member]
Technology-Based Intangible Assets [Member]
Mechanical System [Member]
Information about mechanical systems.
Exhaust [Member]
Information about exhaust.
Accessories [Member]
Information by accessories.
Safety [Member]
Information by safety product.
us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net income (loss)
Customer Relationships [Member]
Net income (loss) - diluted
Earn Out Shares [Member]
Information about earn-out shares.
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
Tax withholding related to vesting of restricted stock units
Contingent Consideration by Type [Axis]
Contingent Consideration Type [Domain]
us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCostExpensed
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed
Net income (loss)
Net income (loss)
Net income (loss)
Restricted Stock Units (RSUs) [Member]
Performance Shares [Member]
Share-Based Payment Arrangement [Member]
Share-Based Payment Arrangement, Option [Member]
Warrant [Member]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
The 401K [Member]
Represents the 401K plan.
The 2021 Omnibus Incentive Plan [Member]
Represents the 2021 Omnibus incentive plan.
Measurement period adjustments
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Acquisition
Defined Contribution Pension [Member]
Represents the defined contribution pension.
Profit Interest Units [Member]
Represents profit interest units.
Business Combination Disclosure [Text Block]
Schedule of Operating Lease Assets and Obligations [Table Text Block]
Tabular disclosure of the schedule of operating lease assets and obligations.
Long-Term Debt, Type [Axis]
Long-Term Debt, Type [Domain]
Earn out adjustment (4)
Represent earn out adjustment.
hlly_TotalAcquisitionRestructuringAndManagementFees
Total acquisition and restructuring costs
Represents the total acquisition, restructuring, and management fees.
Term Loan [Member]
Information about term loan.
Tranche One [Member]
Tranche one.
Measurement Input Share Price1 [Member]
Measurement Input Share Price1.
INVESTING ACTIVITIES:
Earnings (loss) per share:
Earnings Per Share [Text Block]
us-gaap_DeferredFinanceCostsGross
Debt Issuance Costs, Gross
Accrued interest
us-gaap_IncreaseDecreaseInInterestPayableNet
SEC Schedule, 12-09, Reserve, Inventory [Member]
Accounts payable
us-gaap_IncreaseDecreaseInAccountsPayable
us-gaap_DebtInstrumentTerm
Debt Instrument, Term (Year)
us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
Pension liability gain
us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
Foreign currency translation adjustment
The Credit Agreement [Member]
Information regarding the credit agreement.
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Share-Based Payment Arrangement, Expense
us-gaap_AllocatedShareBasedCompensationExpense
Change in deferred taxes
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
Gains included in earnings
Pension liability adjustment
Comprehensive income (loss):
us-gaap_ComprehensiveIncomeNetOfTax
Total comprehensive income (loss)
Accrued and other liabilities
us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities
us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Debt Instrument, Periodic Payment, Principal
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Common Stock, Shares, Outstanding (in shares)
Preferred Stock, Shares Outstanding (in shares)
us-gaap_DebtWeightedAverageInterestRate
Debt, Weighted Average Interest Rate
ITALY
Variable lease expense
us-gaap_LeaseCost
Total lease expense
Weighted average discount rate
Components of lease expense:
Corporate Headquarters [Member]
Related to corporate headquarters.
Operating lease expense
Short-term lease expense
Lease, Cost [Table Text Block]
Right-of-use assets obtained in exchange for new operating lease liabilities
Weighted average remaining lease term (in years) (Year)
Deferred Tax Assets, Change in Valuation Allowance [Table Text Block]
Tabular disclosure for the change in valuation allowance of deferred tax assets.
Schedule of Share-Based Payment Award, Equity Instruments Other Than Options, Valuation Assumptions [Table Text Block]
Tabular disclosure of the significant assumptions used during the year to estimate the fair value of equity instruments other than options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
us-gaap_DebtInstrumentRepurchaseAmount
Debt Instrument, Repurchase Amount
Section 162(m) limitation
Amount of reported income tax expense from difference to expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Section 162(m) limitation.
Interest Rate Collar Liability [Member]
Related to interest rate collar liability.
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Balance
Balance
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
Liabilities reclassed to equity
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Alternative Investment, Measurement Input
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable
Equity compensation
Liability Class [Axis]
Fair Value by Liability Class [Domain]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
us-gaap_IncreaseDecreaseInInventories
Inventories
us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses
Amortization of net loss
us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Net periodic benefit cost
Service cost
Interest cost
us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets
Expected return on plan assets
us-gaap_StockIssuedDuringPeriodSharesAcquisitions
Stock Issued During Period, Shares, Acquisitions (in shares)
us-gaap_StockIssuedDuringPeriodValueAcquisitions
Stock Issued During Period, Value, Acquisitions
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
Issuance of shares for restricted stock units (in shares)
Issuance of shares for restricted stock units
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Forfeited, shares (in shares)
us-gaap_WarrantsAndRightsOutstandingTerm
Warrants and Rights Outstanding, Term (Year)
us-gaap_StockIssuedDuringPeriodSharesNewIssues
Stock Issued During Period, Shares, New Issues (in shares)
us-gaap_CashFDICInsuredAmount
Cash, FDIC Insured Amount
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and stockholders' equity
UNITED STATES
Asset Pledged as Collateral [Member]
Retained earnings
Accumulated other comprehensive loss
Measurement Input, Share Price [Member]
Debt Disclosure [Text Block]
Measurement Input, Price Volatility [Member]
Measurement Input, Risk Free Interest Rate [Member]
Long-term operating lease liabilities - Other noncurrent liabilities
Measurement Input, Expected Term [Member]
Present value of lease liabilities
Total lease liabilities
Current operating lease liabilities - Accrued liabilities
Current portion of operating lease liabilities
Right-of-use assets
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total lease payments
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less imputed interest
us-gaap_DeferredIncomeTaxExpenseBenefit
Total deferred income tax expense (benefit)
Measurement Input Type [Axis]
2026
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
Measurement Input Type [Domain]
2027
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
2028
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive
Thereafter
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax
us-gaap_ShortTermLeaseCommitmentAmount
Short-Term Lease Commitment, Amount
2024
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
2025
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
Valuation Approach and Technique [Axis]
Valuation Approach and Technique [Domain]
us-gaap_PaymentsForRestructuring
Payments for Restructuring
Restructuring (2)
Restructuring Costs
us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax
Fair value adjustments to warrant liability
Fair Value Adjustment of Warrants
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Depreciation
Liability
us-gaap_UnrealizedGainLossOnDerivatives
Unrealized Gain (Loss) on Derivatives
Fair value adjustments to interest rate collar
Fair value adjustments to earn-out liability
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability
Schedule of Intangible Assets [Table Text Block]
Tabular disclosure of schedule of intangible assets.
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Common stock, $0.0001 par value, 550,000,000 shares authorized, 117,707,280 and 117,147,997 shares issued and outstanding on December 31, 2023 and December 31, 2022, respectively
Adjustments to reconcile net income (loss) to net cash from operating activities:
Measurement Frequency [Axis]
Measurement Frequency [Domain]
Fair Value, Recurring [Member]
Common Stock, Shares Authorized (in shares)
Common Stock, Shares, Issued (in shares)
Common Stock, Shares, Issued (in shares)
Common Stock, Par or Stated Value Per Share (in dollars per share)
us-gaap_CommonStockSharesSubscriptions
Common Stock, Value, Subscriptions
Revision of Prior Period [Axis]
us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible
Decrease in Unrecognized Tax Benefits is Reasonably Possible
Revision of Prior Period [Domain]
Previously Reported [Member]
us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Common Stock, Capital Shares Reserved for Future Issuance (in shares)
Revision of Prior Period, Adjustment [Member]
Statistical Measurement [Domain]
Cash paid for amounts included in measurement of operating lease liabilities
Maximum [Member]
Minimum [Member]
Weighted Average [Member]
Product and Service [Axis]
Product and Service [Domain]
Statistical Measurement [Axis]
us-gaap_OperatingLeasesRentExpenseNet
Operating Leases, Rent Expense, Net
Preferred stock, $0.0001 par value, 5,000,000 shares authorized, none issued and outstanding on December 31, 2023 and December 31, 2022
Preferred Stock, Shares Issued (in shares)
Cash paid for interest
Property, Plant and Equipment Disclosure [Text Block]
Geographical [Axis]
Geographical [Domain]
Property, Plant and Equipment [Table Text Block]
Preferred Stock, Shares Authorized (in shares)
Preferred Stock, Par or Stated Value Per Share (in dollars per share)
hlly_DebtInstrumentPeriodicPaymentPercentageOfAnnualExcessCashFlow
Debt Instrument, Periodic Payment, Percentage of Annual Excess Cash FLow
Percentage of annual excess cash flow required to pay down the debt instrument.
hlly_DebtInstrumentCovenantConsolidatedNetLeverageRatio
Debt Instrument, Covenant, Consolidated Net Leverage Ratio
The consolidated net leverage ratio under the covenant of the debt instrument.
Right-of-use liability
hlly_DeferredTaxAssetsRightofuseLiability
Amount before allocation of valuation allowances of deferred tax asset attributable to right-of-use liability.
Fair Value, Inputs, Level 3 [Member]
Fair Value Hierarchy and NAV [Domain]
Customer [Axis]
Customer [Domain]
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 2 [Member]
hlly_DefinedContributionPlanEmployerDiscretionaryContributionPercentOfMatch
Defined Contribution Plan, Employer Discretionary Contribution, Percent of Match
Percentage of employer's discretionary contribution.
Accrued Liabilities and Other Noncurrent Liabilities [Member]
Represents accrued liabilities and other noncurrent liabilities.
Fair Value Hierarchy and NAV [Axis]
us-gaap_ProductWarrantyAccrualPayments
Settlement of warranty claims
Accrued for current year warranty claims
OPERATING ACTIVITIES:
Revenue [Policy Text Block]
Statement [Line Items]
Additional paid-in capital
AOCI Attributable to Parent [Member]
Schedule of Product Warranty Liability [Table Text Block]
Stockholders' equity:
Schedule of Acquisition, Restructuring and Management Fee Costs [Table Text Block]
Tabular disclosure of the schedule of acquisition, restructuring, and management fee cost.
Fair Value Disclosures [Text Block]
us-gaap_Liabilities
Total liabilities
Commitments and contingencies (Refer to Note 19 - Commitments and Contingencies)
Prepaids and other current assets
Counterparty Name [Axis]
Counterparty Name [Domain]
Deferred taxes
us-gaap_DerivativeLiabilities
Derivative Liability
Consolidated Entities [Axis]
Consolidated Entities [Domain]
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
us-gaap_LettersOfCreditOutstandingAmount
Letters of Credit Outstanding, Amount
Disposal Group Classification [Axis]
Disposal Group Classification [Domain]
us-gaap_ProductWarrantyAccrual
Beginning balance
Ending balance
Cost of Goods and Service [Policy Text Block]
Retained Earnings [Member]
Additional Paid-in Capital [Member]
Common Stock [Member]
Equity Components [Axis]
Equity Component [Domain]
Other
Long-Term Debt
us-gaap_LongTermDebt
us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)
Class of Warrant or Right [Axis]
Class of Warrant or Right [Domain]
Other Noncurrent Liabilities [Member]
us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)
us-gaap_ClassOfWarrantOrRightOutstanding
Class of Warrant or Right, Outstanding (in shares)
us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)
Warrants exercised
Value of stock issued as a result of exercises of warrants during this period.
Warrants exercised (in shares)
Number of shares issued as a result of exercises of warrants during this period.
Southern Kentucky Classics [Member]
Southern Kentucky Classics.
RaceQuip [Member]
RaceQuip.
hlly_GainLossOnTerminationOfLeases
Gain on termination of leases
Gain (loss) related to the termination of leases.
us-gaap_DeferredFinanceCostsNet
Debt Issuance Cost Amortization
Less unamortized debt issuance costs
Principal Payment [Member]
Principal Payment.
John's, Southern Kentucky Classics, and Vesta Motorsports [Member]
John's, Southern Kentucky Classics, and Vesta Motorsports.
Document Annual Report
Machinery and Equipment [Member]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Entity Incorporation, State or Country Code
Long-Term Debt, Gross
us-gaap_DebtInstrumentCarryingAmount
Future maturities
Document Transition Report
Document Financial Statement Error Correction [Flag]
Entity Interactive Data Current
Decapitalization of right-of-use assets upon lease termination or modification
Amount of decapitalization of right-of-use assets upon lease termination or modification.
Security Exchange Name
Other Expense [Member]
Title of 12(b) Security
Other Operating Income (Expense) [Member]
us-gaap_ValuationAllowancesAndReservesBalance
Balance
Balance
Reserves from acquisitions
Charged (credited) to costs and expenses
Income Statement Location [Axis]
Income Statement Location [Domain]
Non-US [Member]
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Statement [Table]
us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
Total other comprehensive income (loss)
Income Statement [Abstract]
2026, future maturities
2027, future maturities
Disposal Group Name [Axis]
us-gaap_RestructuringReserve
Restructuring Reserve
2028, future maturities
Disposal Group Name [Domain]
2024, future maturities
2025, future maturities
Transaction [Domain]
us-gaap_DerivativeCapInterestRate
Derivative, Cap Interest Rate
Transaction Type [Axis]
Earn-out liability
Business Combination, Contingent Consideration, Liability, Noncurrent
us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent
Total recognized in other comprehensive (income) loss
Other noncurrent liabilities
us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
Amortization of actuarial loss
Less: fair value adjustment for Warrants
The fair value adjustment of warrants due to classification as liabilities.
Actuarial gain arising during measurement period
Finspeed, Classic Instruments, ADS, Rocket and Speartech [Member]
Represents Finspeed, Classic Instruments, ADS, Rocket and Speartech.
Delayed Draw Term Loan [Member]
Represents delayed draw term loan.
us-gaap_StockholdersEquity
Total stockholders' equity
Balance
Balance
Accrued Liabilities Disclosure [Text Block]
The entire disclosure for accrued liabilities at the end of the reporting period.
hlly_SharebasedCompensationArrangementVestingAwardRightsPercentageOfInitialTargetAwards
Share-based Compensation Arrangement, Vesting Award Rights, Percentage of Initial Target Awards
Percentage of initial target awards for vesting awards rights under share based payment arrangement.
Trade Names 1 [Member]
Represents trade names.
Long-term debt, net of current portion
Long-Term Debt, Excluding Current Maturities
us-gaap_DerivativeFloorInterestRate
Derivative, Floor Interest Rate