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

Description of Business - Joint Venture and Acquisition (Details)

v3.5.0.2

Description of Business - Joint Venture and Acquisition (Details) - USD ($)		1 Months Ended
	Aug. 31, 2016	Aug. 31, 2017	Sep. 30, 2016
Silver Towne
Business Acquisition [Line Items]
Payments to acquire interest in JV	$ 3,453,750
A-MARK PRECIOUS METALS, INC
Business Acquisition [Line Items]
Payments to acquire interest in JV	3,721,250
Scenario, Forecast \| Silver Towne
Business Acquisition [Line Items]
Ownership percentage (percentage)		45.00%
Scenario, Forecast \| A-MARK PRECIOUS METALS, INC
Business Acquisition [Line Items]
Payments to acquire interest in JV		$ 500,000
Ownership percentage (percentage)		55.00%
SilverTowne Mint
Business Acquisition [Line Items]
Payment towards the acquisition	3,171,250
Payments to acquire assets	3,171,250
Working capital acquired	300,000
Purchase price	$ 3,671,250
Earn-out Period (years)	3 years
Contingent liability	$ 1,000,000.0
Fair value of the assets acquired	7,675,000
Contingent earn-out consideration	$ 1,523,000
SilverTowne Mint \| AM&ST Associates, LLC
Business Acquisition [Line Items]
Asset contributed (percentage)	48.47%
Remaining assets purchased (percentage)	51.53%
Land and Building \| SilverTowne Mint
Business Acquisition [Line Items]
Payments to acquire assets	$ 250,000
Asahi Refining USA, Inc
Business Acquisition [Line Items]
Option to purchase investment			10.00%
Commercial Paper \| SilverTowne Mint
Business Acquisition [Line Items]
Liabilities incurred for the acquisition	$ 500,000
Debt instrument, term (years)	1 year

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