Organization, Basis of Presentation, and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepting accounting principles ("GAAP"). Units and shares are presented as whole numbers while all dollar amounts are presented in thousands, unless otherwise noted.
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements include the operations and accounts of the Company and all subsidiaries thereof. All intercompany balances and transactions have been eliminated upon consolidation.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates, and such differences could be material.
Certain Significant Risks and Uncertainties	Certain Significant Risks and Uncertainties The Company is subject to those risks common in manufacturing-driven markets, including, but not limited to, competitive forces, dependence on key personnel, consumer demand for its products, the successful protection of its proprietary technologies, compliance with government regulations and the possibility of not being able to obtain additional financing if and when needed.
Concentration of Credit and Business Risk	Concentration of Credit and Business Risk A majority of the Company’s sales are made pursuant to floor plan financing programs in which the Company participates on behalf of its dealers through a contingent repurchase agreement with various third-party financing institutions. Under these arrangements, a dealer establishes a line of credit with one or more of these third-party lenders for the purchase of dealer boat inventory. When a dealer purchases and takes delivery of a boat pursuant to a floor plan financing arrangement, it draws against its line of credit and the lender pays the invoice cost of the boat directly to the Company within approximately two weeks. For dealers that use local floor plan financing programs or pay cash, the Company may extend credit without collateral under the dealer agreement based on the Company’s evaluation of the dealer’s credit risk and past payment history. The Company maintains allowances for potential credit losses that it believes are adequate.
Cash	Cash The Company considers all highly liquid investments purchased with an original maturity of 90 days or less to be cash equivalents. Cash equivalents are stated at cost, which approximates fair value. As of June 30, 2019 and 2018, no highly liquid investments were held and the entire balance consists of traditional cash. At June 30, 2019 and 2018, substantially all cash on hand was held by two financial institutions. This cash on deposit may be, at times, in excess of insurance limits provided by the FDIC.
Trade Accounts Receivable	Trade Accounts Receivable Trade receivables are carried at original invoice amount less an estimate made for doubtful receivables based on a review of all outstanding amounts on a monthly basis. As of June 30, 2019 and 2018, the allowance for doubtful receivables was $69 and $40, respectively. Management determines the allowance for doubtful accounts by identifying troubled accounts and by using historical experience applied to an aging of accounts. Trade receivables are written off when deemed uncollectible. Recoveries of trade receivables previously written off are recorded when received. A trade receivable is considered to be past due if any portion of the receivable balance is outstanding beyond customer terms.
Capitalization of Offering Costs	Capitalization of Offering Costs Capitalized offering costs are costs directly attributable to the Company's shelf registration statement and equity offerings. As of June 30, 2019 and 2018, $140 and $80 of costs directly attributable to the Company's shelf registration statement and equity offerings were capitalized as prepaid assets. Upon closing of the offerings, these costs are netted against the proceeds and, as such, are reclassified into additional paid in capital. For the fiscal year ended June 30, 2019, the Company capitalized $60 related to a shelf registration statement. For the fiscal year ended June 30, 2018, the Company netted $650 against the proceeds of future offerings under the shelf registration statement based on the number of shares sold in the offering and total number of shares available for issuance under the shelf registration statement.
Goodwill and Intangible Assets	Goodwill Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Goodwill amounts are not amortized, but rather are evaluated for potential impairment on an annual basis, as of June 30, in accordance with the provisions of ASC Topic 350, Intangibles—Goodwill and Other. Under the guidance, the Company may assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If this assessment indicates the possibility of impairment, the income approach to test for goodwill impairment would be used. Under the income approach, management calculates the fair value of its reporting units based on the present value of estimated future cash flows. If the fair value of an individual reporting unit exceeds the carrying value of the net assets including goodwill assigned to that unit, goodwill is not impaired. If the carrying value of the reporting unit’s net assets including goodwill exceeds the fair value of the reporting unit, then management determines the implied fair value of the reporting unit’s goodwill. If the carrying value of the reporting unit’s goodwill exceeds its implied fair value, then the Company would record an impairment loss equal to the difference. For fiscal years ended June 30, 2019 and 2018, the Company performed a qualitative assessment which indicated that the fair value of its reporting units more likely than not exceeded their respective carrying amounts. The Company did not recognize any goodwill impairment charges in the fiscal years ended June 30, 2019, 2018 and 2017. Intangible Assets Intangible assets consist primarily of relationships, reacquired franchise rights, product trade names, legal and contractual rights surrounding a patent and a non-compete agreement. These assets are recorded at their estimated fair values at the acquisition dates using the income approach. Definite lived intangible assets are being amortized using the straight-line method based on their estimated useful lives ranging from 5 to 20 years. The estimated useful lives of dealer relationships consider the average length of dealer relationships at the time of acquisition, historical rates of dealer attrition and retention, the Company’s history of renewal and extension of dealer relationships, as well as competitive and economic factors resulting in a range of useful lives. The useful life of reacquired franchise rights is based on the remainder of the contractual term of the Licensee's exclusive manufacturing and distributors agreement with the Company. The estimated useful lives of the Company’s trade names are based on a number of factors including technological obsolescence and the competitive environment. The estimated useful lives of legal and contractual rights are estimated based on the benefits that the patent provides for its remaining terms unless competitive, technological obsolescence or other factors indicate a shorter life. The useful life of the non-compete agreement is based on a ten-year agreement entered into by the Company and former owner of the Licensee as part of the acquisition. Management, assisted by third-party valuation specialists, determined the estimated fair values of separately identifiable intangible assets at the date of acquisition under the income approach. Significant data and assumptions used in the valuations included cost, market and income comparisons, discount rates, royalty rates and management forecasts. Discount rates for each intangible asset were selected based on judgment of relative risk and approximate rates of returns investors in the subject assets might require. The royalty rates were based on historical and projected sales and profits of products sold and management’s assessment of the intangibles’ importance to the sales and profitability of the product. Management provided forecasts of financial data pertaining to assets, liabilities and income statement balances to be utilized in the valuations. While management believes the assumptions, estimates, appraisal methods and ensuing results are appropriate and represent the best evidence of fair value in the circumstances, modification or use of other assumptions or methods could have yielded different results. The carrying amount of definite lived intangible assets are reviewed whenever circumstances arise that indicate the carrying amount of an asset may not be recoverable. The carrying value of these assets is compared to the undiscounted future cash flows the assets are expected to generate. If the asset is considered to be impaired, the carrying value is compared to the fair value and this difference is recognized as an impairment loss.
Dealer Incentives	Dealer Incentives The Company provides for various structured dealer rebate and sales promotions incentives, which are recognized as a component of sales in measuring the amount of consideration the Company expects to receive in exchange for transferring goods, at the time of sale to the dealer. Examples of such programs include rebates, seasonal discounts, promotional co-op arrangements and other allowances. Dealer rebates and sales promotion expenses are estimated based on current programs and historical achievement and/or usage rates. Actual results may differ from these estimates if market conditions dictate the need to enhance or reduce sales promotion and incentive programs or if dealer achievement or other items vary from historical trends. Free floor financing incentives include payments to the lenders providing floor plan financing to the dealers or directly to the dealers themselves. Free floor financing incentives are estimated at the time of sale to the dealer based on the expected expense to the Company over the term of the free flooring period and are recognized as a reduction in sales. The Company accounts for both incentive payments directly to dealers and payment to third party lenders in this manner.
Tax Receivable Agreement	Tax Receivable Agreement As a result of exchanges of LLC Units into Class A Common Stock and purchases by the Company of LLC Units from holders of LLC Units, the Company will become entitled to a proportionate share of the existing tax basis of the assets of the LLC at the time of such exchanges or purchases. In addition, such exchanges or purchases of LLC Units are expected to result in increases in the tax basis of the assets of the LLC that otherwise would not have been available. These increases in tax basis may reduce the amount of tax that the Company would otherwise be required to pay in the future. These increases in tax basis may also decrease gains (or increase losses) on future dispositions of certain capital assets to the extent tax basis is allocated to those capital assets. In connection with the Company's IPO and the recapitalization the Company completed in connection with its IPO, the Company entered into a tax receivable agreement with the pre-IPO owners of the LLC that provides for the payment by the Company to the pre-IPO owners (or any permitted assignees) of 85% of the amount of the benefits, if any, that the Company deems to realize as a result of (i) increases in tax basis and (ii) certain other tax benefits, including those attributable to payments, under the tax receivable agreement. These contractual payment obligations are the Company's obligations and are not obligations of the LLC, and are accounted for in accordance with ASC 450, Contingencies, since the obligations were deemed to be probable and reasonably estimable. For purposes of the tax receivable agreement, the benefit deemed realized by the Company will be computed by comparing its actual income tax liability (calculated with certain assumptions) to the amount of such taxes that it would have been required to pay had there been no increase to the tax basis of the assets of the LLC as a result of the purchases or exchanges, and had the Company not entered into the tax receivable agreement. The timing and/or amount of aggregate payments due under the tax receivable agreement may vary based on a number of factors, including the amount and timing of the taxable income the Company generates in the future and the tax rate then applicable and amortizable basis. The term of the tax receivable agreement will continue until all such tax benefits have been utilized or expired, unless the Company exercises its right to terminate the tax receivable agreement for an amount based on the agreed payments remaining to be made under the agreement. In certain mergers, asset sales or other forms of business combinations or other changes of control, the Company (or its successor) would owe to the pre-IPO owners of the LLC (or any permitted assignees) a lump-sum payment equal to the present value of all forecasted future payments that would have otherwise been made under the tax receivable agreement that would be based on certain assumptions, including a deemed exchange of all LLC Units and that the Company would have had sufficient taxable income to fully utilize the deductions arising from the increased tax basis and other tax benefits related to entering into the tax receivable agreement.
Income Taxes	Income Taxes Malibu Boats, Inc. is taxed as a C corporation for U.S. income tax purposes and is therefore subject to both federal and state taxation at a corporate level. Following the IPO, the LLC continues to operate in the United States as a partnership for U.S. federal income tax purposes. The Company files various federal and state tax returns, including some returns that are consolidated with subsidiaries. The Company accounts for the current and deferred tax effects of such returns using the asset and liability method. Significant judgments and estimates are required in determining the Company's current and deferred tax assets and liabilities, which reflect management's best assessment of the estimated future taxes it will pay. These estimates are updated throughout the year to consider income tax return filings, its geographic mix of earnings, legislative changes and other relevant items. The Company recognizes deferred tax assets and liabilities based on the differences between the financial statement carrying amounts of assets and liabilities and the amounts applicable for income tax purposes. Deferred tax assets represent items to be realized as a tax deduction or credit in future tax returns. Realization of the deferred tax assets ultimately depends on the existence of sufficient taxable income of the appropriate character in either the carryback or carryforward period. Each quarter the Company analyzes the likelihood that its deferred tax assets will be realized. A valuation allowance is recorded if, based on the weight of all available positive and negative evidence, it is more likely than not (a likelihood of more than 50%) that some portion, or all, of a deferred tax asset will not be realized (see Note 12). On an annual basis, the Company performs a comprehensive analysis of all forms of positive and negative evidence based on year end results. During each interim period, the Company updates its annual analysis for significant changes in the positive and negative evidence. If the Company later determines that realization is more likely than not for deferred tax assets with a valuation allowance, the related valuation allowance will be reduced. Conversely, if the Company determines that it is more likely than not that the Company will not be able to realize a portion of our deferred tax assets, the Company will increase the valuation allowance. The Company recognizes a tax benefit associated with an uncertain tax position when, in its judgment, it is more likely than not that the position will be sustained based upon the technical merits of the position. For a tax position that meets the more-likely-than-not recognition threshold, the Company initially and subsequently measures the income tax benefit as the largest amount that it judges to have a greater than 50% likelihood of being realized. The liability associated with unrecognized tax benefits is adjusted periodically due to changing circumstances, such as the progress of tax audits, case law developments and new or emerging legislation. Such adjustments are recognized entirely in the period in which they are identified. The Company's income tax provision includes the net impact of changes in the liability for unrecognized tax benefits. The Company closed the IRS examination of its June 30, 2015 return during the fourth quarter of fiscal 2019, resulting in an immaterial adjustment to its tax liability. The Company has filed federal and state income tax returns that remain open to examination for fiscal years 2016 through 2018, while its subsidiaries, Malibu Boats Holdings, LLC and Malibu Boats Pty Ltd., remain open to examination for years 2015 through 2018. The Company considers an issue to be resolved at the earlier of the issue being “effectively settled,” settlement of an examination, or the expiration of the statute of limitations. Upon resolution, unrecognized tax benefits will be reversed as a discrete event. The Company's liability for unrecognized tax benefits is generally presented as noncurrent. However, if it anticipates paying cash within one year to settle an uncertain tax position, the liability is presented as current. The Company classifies interest and penalties recognized on the liability for unrecognized tax benefits as income tax expense.
Revenue Recognition	Revenue Recognition Revenue is recognized as performance obligations under the terms of contracts with customers are satisfied; this occurs when control of promised goods (boats, parts, or other) is transferred to the customer, which is upon shipment. Revenue is measured as the amount of consideration expected to be entitled in exchange for transferring goods or providing services. The Company generally manufactures products based on specific order from dealers and often ships completed products only after receiving credit approval from financial institutions. The amount of consideration the Company receives and revenue it recognizes varies with changes in marketing incentives and rebates it offers to its dealers and their customers. Dealers generally have no rights to return unsold boats. From time to time, however, the Company may accept returns in limited circumstances and at the Company’s discretion under its warranty policy, which generally limits returns to instances of manufacturing defects. The Company may be obligated, in the event of default by a dealer, to accept returns of unsold boats under its repurchase commitment to floor financing providers, who are able to obtain such boats through foreclosure. The Company accrues returns when a repurchase and return, due to the default of one of its dealers, is determined to be probable and the amount of the return is reasonably estimable. Historically, product returns, resulting from repurchases made under the floorplan financing program, have not been material and the returned boats have been subsequently resold above their cost. Refer to Note 9 and Note 17 related to the Company’s product warranty and repurchase commitment obligations, respectively. Revenue associated with sales of materials, parts, boats or engine products sold under the Company’s exclusive manufacturing and distribution agreement with its acquired Australian subsidiary are eliminated in consolidation. The Company earns royalties on boats shipped with the Company's proprietary wake surfing technology under licensing agreements with various marine manufacturers. Royalty income is recognized when products are used or sold with our patented technology by these other boat manufacturers and industry suppliers. The usage of our technology satisfies the performance obligation in the contract. See Note 2 for more information. Delivery Costs Shipping and freight costs are included in cost of sales in the accompanying consolidated statements of operations and comprehensive income.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Financial instruments for which the Company did not elect the fair value option include accounts receivable, prepaid expenses and other current assets, credit facilities, accounts payable, accrued expenses and other current liabilities. The carrying amounts of these financial instruments approximate their fair values as a result of their short-term nature or variable interest rates.
Fair Value Measurements	Fair Value Measurements The Company applies the provisions of ASC Topic 820, Fair Value Measurements and Disclosures, for fair value measurements of financial assets and financial liabilities, and for fair value measurements of nonfinancial items that are recognized or disclosed at fair value in the financial statements on a recurring basis. ASC Topic 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. ASC Topic 820 also establishes a framework for measuring fair value and expands disclosures about fair value measurements. In addition to the financial assets and liabilities measured on a recurring basis, certain nonfinancial assets and liabilities are to be measured at fair value on a nonrecurring basis in accordance with applicable GAAP. This includes items such as nonfinancial assets and liabilities initially measured at fair value in a business combination (but not measured at fair value in subsequent periods) and nonfinancial long-lived asset groups measured at fair value for an impairment assessment. In general, non-financial assets including goodwill, other intangible assets and property and equipment are measured at fair value when there is an indication of impairment and are recorded at fair value only when any impairment is recognized. See Note 13 for more information.
Equity-Based Compensation	Equity-Based Compensation The Company expenses employee share-based awards under ASC Topic 718, Compensation—Stock Compensation, which requires compensation cost for the grant-date fair value of share-based awards to be recognized over the requisite service period. The Company estimated the grant date fair value of the share-based awards issued in the form of profit interests granted prior to November 1, 2013 using the Black-Scholes option pricing model and those granted on November 1, 2013 under the Probability-Weighted Expected Return method. Stock options granted to executives on June 29, 2017, November 6, 2017, August 22, 2018 and January 14, 2019 were valued using the Black-Scholes option pricing model. The fair value of restricted stock unit awards granted under the Company's Long Term Incentive Plan ("Incentive Plan") are measured based on the market price of the Company’s stock on the grant date.
Segment Reporting	Segment Reporting The Company reports its results of operations under four reportable segments: Malibu U.S., Malibu Australia, Cobalt, and Pursuit, based on its boat manufacturing operations. The Malibu U.S. and Malibu Australia segments participate in the manufacturing, distribution, marketing and sale of Malibu and Axis performance sport boats. The Malibu U.S. segment primarily serves markets in North America, South America, Europe, and Asia while the Malibu Australia operating segment principally serves the Australian and New Zealand markets. The Company's Cobalt and Pursuit segments participate in the manufacturing, distribution, marketing and sale of Cobalt and Pursuit boats throughout the world, respectively.
Foreign Currency Translation	Foreign Currency Translation The functional currency for the Company's consolidated foreign subsidiary is the applicable local currency. The assets and liabilities are translated at the foreign exchange rate in effect at the applicable reporting date, and the consolidated statements of operations and comprehensive income and cash flows are translated at the average exchange rate in effect during the applicable period. Exchange rate fluctuations on translating the foreign currency financial statements into U.S. dollars that result in unrealized gains or losses are referred to as translation adjustments. Cumulative translation adjustments are reflected as a component of "Accumulated other comprehensive loss," in the stockholders' equity section of the accompanying consolidated balance sheets and periodic changes are included in comprehensive income.
Comprehensive Income	Comprehensive Income Components of comprehensive income include net income and foreign currency translation adjustments. The Company has chosen to disclose comprehensive income in a single continuous statement of operations and comprehensive income.
Recent Accounting Pronouncements	Recent Accounting Pronouncements On July 1, 2018, the Company adopted the new accounting standard, ASC Topic 606, Revenue from Contracts with Customers, and all the related amendments (“ASC 606”) and applied the provisions of the standard to all contracts using the modified retrospective method. The cumulative effect of adopting the new revenue standard was immaterial and no adjustment has been recorded to the opening balance of retained earnings. Prior year information has not been restated and continues to be reported under the accounting standards in effect for those periods. Substantially all of the Company’s revenue continues to be recognized at a point in time when the product is either shipped or received from the Company's facilities and control of the product is transferred to the customer. New controls and processes designed to meet the requirements of the standard were implemented, and the required new disclosures are presented in Note 2. The adoption of ASC Topic 606 did not have a material impact on the amounts reported in the Company's unaudited condensed consolidated financial position, results of operations or cash flows. In February 2016, the FASB issued Accounting Standards Update (ASU) 2016‑-02, Leases (Topic 842). The amendments in this update create Topic 842, Leases, and supersede the requirements in Topic 840, Leases. Topic 842 sets out the principles for recognition, measurement, presentation, and disclosure of leases for both parties to a lease agreement (i.e., lessees and lessors) and supersedes the previous leases standard, Leases (Topic 840). Topic 842 requires lessees to recognize on the balance sheet a right‑of-use asset, representing its right to use the underlying asset for the lease term, and a lease liability for all leases with terms greater than 12 months. The guidance also requires certain qualitative and quantitative disclosures designed to assess the amount, timing, and uncertainty of cash flows arising from leases. The standard requires the use of a modified retrospective transition approach, which includes a number of optional practical expedients that entities may elect to apply. In June 2018, the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements, which provides entities with an additional (optional) transition method to adopt the new lease standard. Under this new transition method, an entity initially applies the new leases standard at the adoption date and recognizes a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The new leases standard is effective for fiscal years beginning after December 15, 2018. Early application is permitted. The Company plans to adopt the standard as of July 1, 2019 using the alternative transition method provided under Topic 842, which allows the Company to initially apply the new lease standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company will elect the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allows the Company to carry forward the historical lease classification. The Company will make an accounting policy election to keep leases with an initial term of 12 months or less off of the balance sheet. The Company will also elect the practical expedient to not separate non-lease components from the lease components to which they relate, and instead account for each separate lease and non-lease component associated with that lease component as a single lease component for all underlying asset classes. Accordingly, all costs associated with a lease contract are accounted for as lease cost. The Company estimates that the adoption of Topic 842 will result in the recognition of additional net lease assets and lease liabilities of approximately $15,000 to $20,000, as of July 1, 2019. The Company does not believe the adoption of Topic 842 will have a material impact on the Company’s consolidated results of operations, equity or cash flows as of the adoption date. Under the alternative method of adoption, comparative information will not be restated, but will continue to be reported under the standards in effect for those periods. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. This guidance provides specific classification of how certain cash receipts and cash payments are presented in the statement of cash flows. The ASU was applied using a retrospective transition method. The adoption of this ASU on July 1, 2018 did not have a material impact on the Company's consolidated financial statements. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. The guidance clarifies the definition of a business that provides a two-step analysis in the determination of whether an acquisition or derecognition is a business or an asset. The update removes the evaluation of whether a market participant could replace any missing elements and provides a framework to assist entities in evaluating whether both an input and a substantive process are present. This guidance will be applied on a prospective basis for transactions that occur after the effective date. The adoption of this ASU on July 1, 2018 did not have a material impact on the Company's consolidated financial statements.