A-Mark Precious Metals, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Subsequent Event (Details)

v2.4.1.9

Subsequent Event (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended
	Sep. 19, 2014	May 01, 2015	Apr. 01, 2015	Jan. 23, 2015	Jul. 02, 2014	Jun. 18, 2014	Jun. 05, 2014
Subsequent Event [Line Items]
Short term loan receivable				$ 3.1	$ 3.7	$ 2.6	$ 3.8
Payments to acquire Tranche A	1.1
Payment for closing of Tranche A	2.0
Subsequent Event [Member]
Subsequent Event [Line Items]
Payment to acquire Tranche B			$ 0.9
Common Stock, Dividends, Per Share, Declared		$ 0.05
Common Class A
Subsequent Event [Line Items]
Percentage of stock to be purchased for Tranche A	5.00%
Agreement to purchase noncontrolling interest, percentage	9.00%
Common Class A \| Subsequent Event [Member]
Subsequent Event [Line Items]
Percentage of stock to be purchased for Tranche B			4.00%

- Definition

Cost Method Investment, Agreement to Purchase Common Stock, First Tranche, Percentage

+ References

No definition available.

+ Details

Name:	amrk_CostMethodInvestmentAgreementtoPurchaseCommonStockFirstTranchePercentage
Namespace Prefix:	amrk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Noncontrolling Interest, Agreement to Purchase Common Stock, Percentage

+ References

No definition available.

+ Details

Name:	amrk_CostMethodInvestmentAgreementtoPurchaseCommonStockPercentage
Namespace Prefix:	amrk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Cost Method Investment, Agreement to Purchase Common Stock, Second Tranche, Percentage

+ References

No definition available.

+ Details

Name:	amrk_CostMethodInvestmentAgreementtoPurchaseCommonStockSecondTranchePercentage
Namespace Prefix:	amrk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Payments to Acquire Businesses and Interest in Affiliates, Trance One

+ References

No definition available.

+ Details

Name:	amrk_PaymentstoAcquireBusinessesandInterestinAffiliatesTranceOne
Namespace Prefix:	amrk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Payments to Acquire Businesses and Interest in Affiliates, Trance Two

+ References

No definition available.

+ Details

Name:	amrk_PaymentstoAcquireBusinessesandInterestinAffiliatesTranceTwo
Namespace Prefix:	amrk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

+ Details

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of a controlling interest in another entity or an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: