Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.21.1
Document and Entity Information - shares
 9 Months Ended
Mar. 31, 2021
May 06, 2021
Cover [Abstract]    
Entity Registrant Name A-Mark Precious Metals, Inc.  
Entity Central Index Key 0001591588  
Entity Tax Identification Number 11-2464169  
Entity File Number 001-36347  
Current Fiscal Year End Date --06-30  
Entity Filer Category Non-accelerated Filer  
Document Type 10-Q  
Document Period End Date Mar. 31, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 2121 Rosecrans Ave  
Entity Address, Address Line Two Suite 6300  
Entity Address, City or Town El Segundo  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 90245  
City Area Code 310  
Local Phone Number 587-1477  
Title of 12(b) Security Common Stock, $0.01 par value  
Trading Symbol AMRK  
Security Exchange Name NASDAQ  
Document Quarterly Report true  
Document Transition Report false  
Entity Common Stock, Shares Outstanding   11,136,233