XML 29 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Document And Entity Information - USD ($)
 12 Months Ended
Jun. 30, 2018
Aug. 29, 2018
Dec. 31, 2017
Document Information [Line Items]      
Entity Registrant Name Contango ORE, Inc.    
Entity Central Index Key 0001502377    
Trading Symbol ctgo    
Current Fiscal Year End Date --06-30    
Entity Filer Category Smaller Reporting Company    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Common Stock, Shares Outstanding (in shares)   6,153,266  
Entity Public Float     $ 49,235,814
Document Type 10-K    
Document Period End Date Jun. 30, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Amendment Flag false