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Goodwill and Intangible Assets (Narrative) (Details) (USD $)
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9 Months Ended | ||||
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Mar. 31, 2015
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Mar. 31, 2014
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Jun. 30, 2014
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Jun. 30, 2012
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Sep. 30, 2012
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| Finite-Lived Intangible Assets [Line Items] | |||||
| Goodwill | $ 4,900,000us-gaap_GoodwillGross | ||||
| Gross carrying amount - finite lived intangible | 8,396,000amrk_IntangibleAssetsGrossCarryingAmount | 8,396,000amrk_IntangibleAssetsGrossCarryingAmount | |||
| Amortization expense related to intangible assets | $ 300,000us-gaap_AmortizationOfIntangibleAssets | $ 300,000us-gaap_AmortizationOfIntangibleAssets | |||
| Spectrum PMI | |||||
| Finite-Lived Intangible Assets [Line Items] | |||||
| Ownership percentage |
80.00%us-gaap_MinorityInterestOwnershipPercentageByParent / dei_LegalEntityAxis = amrk_SpectrumPMIMember |
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| Spectrum PMI | Auctentia SL | |||||
| Finite-Lived Intangible Assets [Line Items] | |||||
| Noncontrolling interest percentage |
20.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = amrk_SpectrumPMIMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = amrk_AuctentiaSlMember |
20.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = amrk_SpectrumPMIMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = amrk_AuctentiaSlMember |
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- Definition
Intangible Assets Gross Carrying Amount No definition available.
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- Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. No definition available.
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- Definition
The parent entity's interest in net assets of the subsidiary, expressed as a percentage. No definition available.
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- Details
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