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v3.19.2

Related Party Transactions (Details) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2019 USD ($) member | Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($)
Related Party Transactions [Abstract] |  |  |
Number of directors | member | 2 |  |
Directors services | $ 347 | $ 421 | $ 374
Directors services, prepayment | $ 51 | $ 75 |

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- Definition Board of Director Members, Number + References No definition available. + Details
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- Definition Noninterest Expense Directors Fees, Prepayment + References No definition available. + Details
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Namespace Prefix: | mbuu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Noninterest expense related to directors' fees which are fees paid by an Entity to its directors. Directors' fees may be paid in addition to salary and other benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 + Details
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- References No definition available. + Details
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