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

Summary of Significant Accounting Policies (Narrative) (Details)

v3.3.1.900

Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015 USD ($) investment	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) Segment investment	Dec. 31, 2014 USD ($)	Jan. 15, 2016	Jun. 30, 2015 USD ($)
Property, Plant and Equipment [Line Items]
Number of Investments \| investment	2		2
Number of reportable segments \| Segment			1
Long-term investments	$ 4,836		$ 4,836			$ 2,500
Ownership percentage, 1st investment ( in percentage)	2.50%		2.50%			2.50%
Ownership percentage, 2nd investment ( in percentage)	15.00%		15.00%			9.00%
Advertising expense	$ 200	$ 100	$ 300	$ 300
Shipping, handling costs	$ 1,800	$ 1,800	$ 4,100	$ 3,200
Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of related assets			3 years
Estimated useful lives of intangibles			3 years
Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of related assets			5 years
Estimated useful lives of intangibles			15 years
Subsequent Event [Member]
Property, Plant and Equipment [Line Items]
Ownership percentage, 2nd investment ( in percentage)					20.00%

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