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

Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Customer Concentrations) (Details)

Summary of Significant Accounting Policies (Customer Concentrations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			3 Months Ended					3 Months Ended	12 Months Ended	3 Months Ended							3 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended					3 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Sep. 30, 2014 Revenue Customer concentrations	Sep. 30, 2013 Revenue Customer concentrations	Sep. 30, 2014 Accounts receivable Customer concentrations	Sep. 30, 2013 Accounts receivable Customer concentrations	Jun. 30, 2014 Accounts receivable Customer concentrations	Sep. 30, 2014 Secured loans Customer concentrations	Jun. 30, 2014 Secured loans Customer concentrations	Sep. 30, 2014 HSBC Bank USA Revenue Customer concentrations	Sep. 30, 2013 HSBC Bank USA Revenue Customer concentrations	Sep. 30, 2014 US Mint Revenue Customer concentrations	Sep. 30, 2013 US Mint Revenue Customer concentrations	Sep. 30, 2014 US Mint Accounts receivable Customer concentrations	Sep. 30, 2013 US Mint Accounts receivable Customer concentrations	Jun. 30, 2014 US Mint Accounts receivable Customer concentrations	Sep. 30, 2014 Veris Gold Accounts receivable Customer concentrations	Sep. 30, 2013 Veris Gold Accounts receivable Customer concentrations	Jun. 30, 2014 Veris Gold Accounts receivable Customer concentrations	Sep. 30, 2014 Customer A Secured loans Customer concentrations	Jun. 30, 2014 Customer A Secured loans Customer concentrations	Sep. 30, 2014 Customer B Secured loans Customer concentrations	Jun. 30, 2014 Customer B Secured loans Customer concentrations	Sep. 30, 2014 Customer C Secured loans Customer concentrations	Jun. 30, 2014 Customer C Secured loans Customer concentrations	Sep. 30, 2014 Major Customers Revenue Customer concentrations	Sep. 30, 2013 Major Customers Revenue Customer concentrations	Sep. 30, 2014 Major Customers Accounts receivable Customer concentrations	Sep. 30, 2013 Major Customers Accounts receivable Customer concentrations	Jun. 30, 2014 Major Customers Accounts receivable Customer concentrations	Sep. 30, 2014 Major Customers Secured loans Customer concentrations	Jun. 30, 2014 Major Customers Secured loans Customer concentrations
Concentration Risk [Line Items]
Total revenue	$ 1,453,466	$ 1,496,025		$ 1,453,466	$ 1,496,025						$ 534,538	$ 312,545	$ 109,223	$ 168,680													$ 643,761	$ 481,225
Total accounts receivable, net (excluding secured loans and derivative assets)	58,676		39,409			58,676		39,409							38,127		0	7,103		0									45,230		0
Total secured loans	38,627		41,261						38,627	41,261											5,640	3,771	4,200	4,200	4,075	4,103						13,915	12,074
Concentration risk, percentage				100.00%	100.00%	100.00%	100.00%		100.00%	100.00%	36.80%	20.90%	7.50%	11.30%	65.00%	0.00%		12.10%	0.00%		14.60%	9.10%	10.90%	10.20%	10.50%	10.00%	44.30%	32.20%	77.10%	0.00%		36.00%	29.30%
Derivative asset	$ 46,200		$ 22,200

- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money within one year from the balance sheet date (or the normal operating cycle, whichever is longer), net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

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