Document And Entity Information
us-gaap_DerivativeNotionalAmount
Derivative, Notional Amount
Note To Financial Statement Details Textual
Significant Accounting Policies
Note 2 - Inventory
Note 3 - Property, Plant and Equipment, Net
Note 4 - Goodwill and Other Intangible Assets
Note 5 - Accrued Liabilities
Note 6 - Debt
Note 9 - Fair Value Measurements
Note 10 - Revenue
Note 11 - Income Taxes
Income Tax Disclosure [Text Block]
Note 12 - Earnings Per Share
Note 13 - Equity-based Compensation Plans
Hedging Designation [Axis]
Note 14 - Lease Commitments
Hedging Designation [Domain]
Note 15 - Commitments and Contingencies
Designated as Hedging Instrument [Member]
us-gaap_LiabilitiesCurrent
Total current liabilities
Note 2 - Inventory - Schedule of Inventory (Details)
Schedule of Maturities of Long-Term Debt [Table Text Block]
Note 3 - Property, Plant and Equipment, Net - Schedule of Property, Plant, and Equipment (Details)
Schedule of Debt [Table Text Block]
Note 3 - Property, Plant and Equipment, Net - Schedule of Long-lived Assets by Geographic Locations (Details)
Note 4 - Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details)
Note 4 - Goodwill and Other Intangible Assets - Schedule of Finite-lived Intangible Assets, Future Amortization Expense (Details)
Note 5 - Accrued Liabilities - Accrued Liabilities (Details)
Note 6 - Debt - Schedule of Debt (Details)
Note 6 - Debt - Future Maturities of Long-term Debt and Amortization of Debt Issuance Cost (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Note 9 - Fair Value Measurements - Schedule of Value Assets and Liabilities Measured on Recurring Basis (Details)
Note 9 - Fair Value Measurements - Summary of Assumptions for Estimated Fair Value Using Monte Carlo Simulation Model (Details)
Note 9 - Fair Value Measurements - Reconciliation of Changes (Details)
Note 10 - Revenue - Summary of Revenue by Product Category (Details)
Note 10 - Revenue - Summary of Revenue Based on Geographic Location (Details)
Note 11 - Income Taxes - Schedule of Provision and Effective Tax rates (Details)
Note 12 - Earnings Per Share - Schedule of Basic and Diluted Earning Per Share (Details)
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Note 12 - Earnings Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details)
Note 13 - Equity-based Compensation Plans - Schedule of Components of Equity-based Compensation Expense (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 (income)
Note 13 - Equity-based Compensation Plans - Summary of Restricted Stock Units Activity (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Vested, weighted average grant date fair value (in dollars per share)
Note 13 - Equity-based Compensation Plans - Summary of Stock Option Activity (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
Forfeited, weighted average grant date fair value (in dollars per share)
Note 14 - Lease Commitments - Schedule of Operating Lease Assets and Obligations (Details)
Note 14 - Lease Commitments - Schedule of Operating Lease Expense Supplemental Cash Flow Information (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Balance (in dollars per share)
Balance (in dollars per share)
Note 14 - Lease Commitments - Schedule of Future Minimum Rental Payments for Operating Leases (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Forfeited, shares (in shares)
Note 15 - Commitments and Contingencies - Schedule of Accrual For Product Warranties (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Balance (in shares)
Balance (in shares)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Current portion of long-term debt
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested, shares (in shares)
us-gaap_LongTermDebtCurrent
Less current portion of long-term debt
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
Options exercisable, weighted average exercise price (in dollars per share)
Options exercisable, weighted average remaining contractual term (Year)
Interest Rate Contract [Member]
Options exercisable, shares (in shares)
Options outstanding, weighted average remaining contractual term (Year)
Retirement Plan Name [Axis]
Financial Instruments [Domain]
Retirement Plan Name [Domain]
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]
Goodwill and Intangible Assets Disclosure [Text Block]
Domestic Plan [Member]
Accrued liabilities
Total accrued liabilities
Foreign Plan [Member]
us-gaap_AccruedIncomeTaxesCurrent
Accrued taxes
us-gaap_InterestPayableCurrent
Accrued interest
Lessee, Operating Leases [Text Block]
Retirement Plan Sponsor Location [Axis]
Retirement Plan Sponsor Location [Domain]
Accounts payable
Revolving Credit Facility [Member]
Proceeds from the disposal of fixed assets
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options outstanding, shares (in shares)
Options outstanding, shares (in shares)
Emerging Growth Company [Policy Text Block]
Emerging growth company.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod
Expired, shares (in shares)
Risks And Uncertainties [Policy Text Block]
Risks and uncertainties.
Credit Facility [Axis]
us-gaap_AccruedEmployeeBenefitsCurrent
Accrued employee compensation and benefits
Credit Facility [Domain]
us-gaap_OtherAccruedLiabilitiesCurrent
Accrued other
us-gaap_PolicyTextBlockAbstract
Accounting Policies
Trade Names [Member]
Warrant Liability Private Placement Warrants [Member]
Information about Warrant Liability Private Placement Warrants.
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.
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)
Measurement Input Price Hurdle One [Member]
Measurement Input Price Hurdle One.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)
Measurement Input Strike Price [Member]
Measurement Input Strike Price Member.
Measurement Input Price Threshold [Member]
Measurement Input Price Threshold.
Cash paid for income taxes
LIABILITIES AND STOCKHOLDERS' EQUITY
Electronic Systems [Member]
Information about electronic systems.
Liabilities, Current [Abstract]
Common Share Data:
Supplemental disclosures of cash flow information:
us-gaap_Assets
Total assets
Plan Name [Axis]
Technology-Based Intangible Assets [Member]
Shareholders' Equity and Share-Based Payments [Text Block]
Plan Name [Domain]
Mechanical System [Member]
Information about mechanical systems.
Exhaust [Member]
Information about exhaust.
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Accessories [Member]
Information by accessories.
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
Safety [Member]
Information by safety product.
us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net income
Customer Relationships [Member]
Delayed Draw Term Loan (DDTL) [Member]
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]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
Tax withholding related to vesting of restricted stock units
Contingent Consideration by Type [Axis]
Contingent Consideration Type [Domain]
Award Type [Domain]
Award Type [Axis]
Net income (loss)
Net income
Net income
Finite-Lived Intangible Assets, Accumulated Amortization
Finite-Lived Intangible Assets, Net
Total
Other intangibles assets, net
Restricted Stock Units (RSUs) [Member]
Finite-Lived Intangible Assets, Gross
Performance Shares [Member]
Share-Based Payment Arrangement [Member]
Private and Public Warrants [Member]
Represents private and public warrants.
Share-Based Payment Arrangement, Option [Member]
Warrant [Member]
Inventory [Axis]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Inventory [Domain]
The 401K [Member]
Represents the 401K plan.
The 2021 Omnibus Incentive Plan [Member]
Represents the 2021 Omnibus incentive plan.
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
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
Property, Plant, and Equipment, Gross
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]
Thereafter
hlly_LesseeOperaingLeaseLiabilityToBePaidAfterYearFour
Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
Term Loan [Member]
Information about term loan.
Tranche One [Member]
Tranche one.
Measurement Input Share Price1 [Member]
Measurement Input Share Price1.
Derivative Instrument [Axis]
Derivative Contract [Domain]
INVESTING ACTIVITIES:
Earnings per share:
Earnings Per Share [Text Block]
us-gaap_DeferredFinanceCostsGross
Debt Issuance Costs, Gross
Letter of Credit [Member]
Accrued interest
us-gaap_IncreaseDecreaseInInterestPayableNet
Income tax expense (benefit)
Accounts payable
us-gaap_IncreaseDecreaseInAccountsPayable
us-gaap_OperatingExpenses
Total operating expense
us-gaap_DebtInstrumentTerm
Debt Instrument, Term (Year)
us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Defined Contribution Plan, Employer Discretionary Contribution Amount
us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax
Foreign currency translation adjustment
Cash and cash equivalents
The Credit Agreement [Member]
Information regarding the credit agreement.
Share-Based Payment Arrangement, Expense
us-gaap_AllocatedShareBasedCompensationExpense
Change in deferred taxes
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
Losses included in earnings
Amendment Flag
Comprehensive income:
us-gaap_ComprehensiveIncomeNetOfTax
Total comprehensive income
City Area Code
New Accounting Pronouncements, Policy [Policy Text Block]
Accrued and other liabilities
us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities
us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Debt Instrument, Periodic Payment, Principal
us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Gain on disposal of property, plant and equipment
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
Current Fiscal Year End Date
Variable lease expense
us-gaap_LeaseCost
Total lease expense
Weighted average discount rate
Inventory Related To Acquisitions And Product Rationalization Initiatives [Member]
Represents the Inventory Related To Acquisitions And Product Rationalization Initiatives.
Components of lease expense:
Document Fiscal Period Focus
Corporate Headquarters [Member]
Related to corporate headquarters.
Operating lease expense
Document Fiscal Year Focus
Consolidation, Policy [Policy Text Block]
Short-term lease expense
Lease, Cost [Table Text Block]
Document Period End Date
Right-of-use assets obtained in exchange for new operating lease liabilities
Weighted average remaining lease term (in years) (Year)
Entity File Number
Entity Ex Transition Period
Entity Emerging Growth Company
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
Document Type
us-gaap_GainsLossesOnExtinguishmentOfDebt
Loss on early extinguishment of long-term debt
Entity Small Business
Interest Rate Collar Liability [Member]
Related to interest rate collar liability.
Entity Shell Company
Document Information [Line Items]
Document Information [Table]
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Balance
Balance
Entity Filer Category
Debt Instrument [Axis]
Entity Current Reporting Status
Debt Instrument, Name [Domain]
us-gaap_GoodwillImpairmentLoss
Goodwill, Impairment Loss
Alternative Investment, Measurement Input
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable
Equity compensation
Entity Tax Identification Number
Entity Central Index Key
Entity Registrant Name
Liability Class [Axis]
Fair Value by Liability Class [Domain]
Entity [Domain]
Legal Entity [Axis]
Entity Address, Address Line One
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
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]
Material Terms of Trading Arrangement [Text Block]
Entity Common Stock, Shares Outstanding
us-gaap_IncreaseDecreaseInInventories
Inventories
Trading Symbol
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
us-gaap_StockIssuedDuringPeriodSharesAcquisitions
Stock Issued During Period, Shares, Acquisitions (in shares)
Local Phone Number
us-gaap_StockIssuedDuringPeriodValueAcquisitions
Stock Issued During Period, Value, Acquisitions
us-gaap_TableTextBlock
Notes Tables
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
Selling, general, and administrative
Provision for credit losses
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Forfeited, shares (in shares)
us-gaap_WarrantsAndRightsOutstandingTerm
Warrants and Rights Outstanding, Term (Year)
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and stockholders' equity
UNITED STATES
Asset Pledged as Collateral [Member]
Retained earnings
Research and development costs
Accumulated other comprehensive loss
Measurement Input, Share Price [Member]
Debt Disclosure [Text Block]
us-gaap_InterestExpense
Interest expense, net
Measurement Input, Price Volatility [Member]
Measurement Input, Risk Free Interest Rate [Member]
Amortization of deferred loan costs
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Inventory Disclosure [Text Block]
Long-term operating lease liabilities
Schedule of Inventory, Current [Table Text Block]
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
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]
Right-of-use assets
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total lease payments
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less imputed interest
Measurement Input Type [Axis]
2027
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
Measurement Input Type [Domain]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
2024 (excluding the thirteen weeks ended March 31, 2024)
2028
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
Equity compensation
us-gaap_EmployeeBenefitsAndShareBasedCompensation
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2026
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2027
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2028
2025
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
2026
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
Valuation Approach and Technique [Axis]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Valuation Approach and Technique [Domain]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2025
Restructuring costs
Fair value adjustments to warrant liability
Fair Value Adjustment of Warrants
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Other noncurrent assets
2024 (excluding the thirteen weeks ended March 31, 2024)
us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
Interest rate collar
Depreciation
Liability
us-gaap_AssetsCurrent
Total current assets
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, 118,311,341 and 117,707,280 shares issued and outstanding on March 31, 2024 and December 31, 2023, respectively
Adjustments to reconcile net income 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, Par or Stated Value Per Share (in dollars per share)
us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Common Stock, Capital Shares Reserved for Future Issuance (in shares)
Statistical Measurement [Domain]
Cash paid for amounts included in measurement of operating lease liabilities
Maximum [Member]
Minimum [Member]
Product and Service [Axis]
Product and Service [Domain]
Statistical Measurement [Axis]
Preferred stock, $0.0001 par value, 5,000,000 shares authorized, none issued and outstanding on March 31, 2024 and December 31, 2023
Preferred Stock, Shares Issued (in shares)
Cash paid for interest
Property, Plant and Equipment Disclosure [Text Block]
Geographical [Axis]
Property, Plant and Equipment [Table Text Block]
Geographical [Domain]
Preferred Stock, Shares Authorized (in shares)
Inventory
Inventory, Net
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.
Work-in-process
hlly_DebtInstrumentCovenantConsolidatedNetLeverageRatio
Debt Instrument, Covenant, Consolidated Net Leverage Ratio
The consolidated net leverage ratio under the covenant of the debt instrument.
Fair Value, Inputs, Level 3 [Member]
Revenue from External Customers by Products and Services [Table Text Block]
Finished goods
Fair Value Hierarchy and NAV [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.
Fair Value Hierarchy and NAV [Axis]
us-gaap_ProductWarrantyAccrualPayments
Settlement of warranty claims
Raw materials
Accrued for current year warranty claims
Construction in Progress [Member]
OPERATING ACTIVITIES:
Accounts receivable, less allowance for credit losses of $1,368 and $1,577 respectively
Statement [Line Items]
Accounts Receivable, Allowance for Credit Loss, Current
Additional paid-in capital
Building and Building Improvements [Member]
AOCI Attributable to Parent [Member]
Schedule of Product Warranty Liability [Table Text Block]
Stockholders' equity:
Land [Member]
Long-Lived Tangible Asset [Axis]
us-gaap_NonoperatingIncomeExpense
Total non-operating expense
Long-Lived Tangible Asset [Domain]
Fair Value Disclosures [Text Block]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Beginning of period
End of period
ASSETS
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net change in cash and cash equivalents
us-gaap_Liabilities
Total liabilities
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash used in financing activities
Commitments and contingencies (Refer to Note 15 - Commitments and Contingencies)
Effect of foreign currency rate fluctuations on cash
us-gaap_OperatingIncomeLoss
Operating income
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash provided by operating activities
Prepaids and other current assets
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
Cost of goods sold
us-gaap_GrossProfit
Gross profit
Deferred taxes
Provision for inventory reserves
Inventory Write-down
us-gaap_DerivativeLiabilities
Derivative Liability
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Payments from stock-based award activities
us-gaap_LettersOfCreditOutstandingAmount
Letters of Credit Outstanding, Amount
us-gaap_ProductWarrantyAccrual
Beginning balance
Ending balance
President [Member]
Retained Earnings [Member]
Net sales
Title and Position [Domain]
Title and Position [Axis]
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]
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_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income before income taxes
us-gaap_PaymentsOfFinancingCosts
Deferred financing fees
us-gaap_DeferredFinanceCostsNet
Debt Issuance Cost Amortization
Less unamortized debt issuance costs
Principal Payment [Member]
Principal Payment.
us-gaap_RepaymentsOfLongTermDebt
Repayments of Long-Term Debt
Principal payments on long-term debt
Revenue from Contract with Customer [Text Block]
Machinery and Equipment [Member]
Document Quarterly Report
Entity Incorporation, State or Country Code
Long-Term Debt, Gross
us-gaap_DebtInstrumentCarryingAmount
Future maturities
Accounting Policies [Abstract]
Document Transition Report
Basis of Accounting, Policy [Policy Text Block]
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
Title of 12(b) Security
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 and allowances
Represents current accrued returns and allowance.
hlly_DebtInstrumentCovenantMinimumLiquidity
Debt Instrument, Covenant, Minimum Liquidity
Represents minimum liquidity for debt instrument covenant.
us-gaap_SharePrice
Share Price (in dollars per share)
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)
Weighted average common shares outstanding - diluted (in shares)
Weighted average common shares outstanding - diluted (in shares)
Warrant liability
Warrant Liability
Represent warrant liability.
Non-US [Member]
Asset Class [Axis]
Asset Class [Domain]
Statement [Table]
Statement of Financial Position [Abstract]
Diluted net income per share (in dollars per share)
Weighted average common shares outstanding - basic (in shares)
Effective tax rate
Effective Income Tax Rate Reconciliation, Percent
Business Acquisition [Axis]
Basic net income 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.
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
2024 (excluding the thirteen weeks ended March 31, 2024), future maturities
Statement of Stockholders' Equity [Abstract]
Income Statement [Abstract]
2027, future maturities
2028, future maturities
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]
2025, future maturities
2026, future maturities
us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
hlly_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour
Thereafter
Finite Lived Intangible Assets Amortization Expense After Year Four.
us-gaap_DerivativeCapInterestRate
Derivative, Cap Interest Rate
hlly_DebtInstrumentWithdrawnAmount
Debt Instrument, Withdrawn Amount
Debt Instrument Withdrawn Amount.
First Lien Note Due November 17, 2028 [Member]
Information about the first lien note.
Earn-out liability
Business Combination, Contingent Consideration, Liability, Noncurrent
Asset Acquisition, Contingent Consideration, Liability, Current
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]
Other noncurrent liabilities
2028, debt issuance costs amortization
Amortization of Debt Issuance Costs Year Four.
Derivative Financial Instruments, Assets [Member]
Warrant Liability [Text Block]
Disclosure of warrant liability.
us-gaap_PaymentsForProceedsFromHedgeInvestingActivities
Payments for (Proceeds from) Hedge, Investing Activities
Public Warrants [Member]
Represents public warrants.
hlly_AmortizationOfDebtIssuanceCostsRemainderOfFiscalYear
2024 (excluding the thirteen weeks ended March 31, 2024)
Amortization of debt issuance costs remainder of fiscal year.
2025, debt issuance costs amortization
Amortization of debt issuance costs year one.
2026, debt issuance costs amortization
Amortization of debt issuance costs year two.
2027, debt issuance costs amortization
Amortization of debt issuance costs year three.
Private Placement Warrants [Member]
Represents private placement warrants.
Pledged Status [Domain]
Pledged Status [Axis]
us-gaap_StockholdersEquity
Total stockholders' equity
Balance
Balance
Amortization of right of use assets
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.
Class of Stock [Axis]
Class of Stock [Domain]
Trade Names 1 [Member]
Represents trade names.
Long-term debt, net of current portion
Long-Term Debt, Excluding Current Maturities
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
us-gaap_DerivativeFloorInterestRate
Derivative, Floor Interest Rate