Quarterly report pursuant to Section 13 or 15(d)

DEI Document

DEI Document
6 Months Ended
Dec. 31, 2013
Mar. 26, 2014
Document and Entity Information [Abstract]    
Entity Registrant Name A-Mark Precious Metals, Inc.  
Entity Central Index Key 0001591588  
Trading Symbol AMRK  
Current Fiscal Year End Date --06-30  
Entity Filer Category Non-accelerated Filer  
Document Type 10-Q  
Document Period End Date Dec. 31, 2013  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Well-known Seasoned Issuer No  
Entity Volunteer Filers No  
Entity Volunteer Filers Yes  
Entity Common Stock, Shares Outstanding   7,402,664