v3.5.0.2
Document And Entity Information - shares
3 Months Ended
Sep. 30, 2016
Oct. 31, 2016
Document Information [Line Items]    
Entity Registrant Name COLLECTORS UNIVERSE INC  
Entity Central Index Key 0001089143  
Trading Symbol clct  
Current Fiscal Year End Date --06-30  
Entity Filer Category Accelerated Filer  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Well-known Seasoned Issuer No  
Entity Common Stock, Shares Outstanding (in shares)   8,898,104
Document Type 10-Q  
Document Period End Date Sep. 30, 2016  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q1  
Amendment Flag false