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

Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Narrative) (Details)

Stockholders' Equity (Narrative) (Details) - USD ($)							3 Months Ended	12 Months Ended
Stockholders' Equity (Narrative) (Details) - USD ($)	Sep. 11, 2015	May. 01, 2015	Jun. 04, 2014	Mar. 14, 2014	Feb. 12, 2014	Jul. 02, 2013	Jun. 04, 2014	Jun. 30, 2015	Jun. 30, 2014	Mar. 17, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares outstanding								6,973,549	6,962,742	7,402,664
Cancellation of shares by Former Parent, shares				(71,922)
Repurchase common stock			$ 2,200,000						$ 2,198,000
Stock repurchase related interest expense							$ 20,000
Interest rate at second closing, percentage							4.00%
Dividend declared (usd per share)		$ 0.05
Anticipated quarterly payment of dividend, percentage								5.00%
Payments related to tax withholding for share-based compensation								$ 100,000	53,000
Intrinsic value, balance								$ 283,000	$ 407,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for recognition of nonvested awards (in years)								9 months 21 days
Total shares withheld								9,570	4,549
Shares outstanding								86,298	106,674		0
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period								3 years
Shares outstanding								8,990
Fair value assumptions, exercise price								$ 50.31
Intrinsic value, balance								$ 0	$ 0
2014 Stock Award and Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum amount of shares per employee								250,000
Shares granted under the plan, shares								622,000
Former Parent (SGI)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends paid to SGI					$ 5,000,000	$ 5,000,000			$ 10,000,000
Non Employee Director Except Chairman of the Board \| 2014 Stock Award and Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum grant date fair value								$ 300,000
Chairman of the Board \| 2014 Stock Award and Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum grant date fair value								$ 600,000
Auctentia SL
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase common stock, shares			373,513
Afinsa
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase common stock, shares			5,520
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend declared (usd per share)	$ 0.05