v3.8.0.1
Document And Entity Information - shares
9 Months Ended
Sep. 30, 2017
Nov. 06, 2017
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2017  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q3  
Entity Registrant Name Contango Oil & Gas Company  
Entity Central Index Key 0001071993  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   25,509,792
Entity Current Reporting Status Yes