Related Party Transactions Narrative (Details) (USD $)	3 Months Ended	6 Months Ended		52 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012
Related Party Transaction [Line Items]
Director Compensation for Related Party	$ 28,000	$ 56,000
Related Party Transaction, Oil and Gas Properties [Abstract]
Ownership interest in REX by a third party		33.30%
Related Party Transaction, Stock Transactions [Abstract]
Stock options, net-settled				45,000
Number of shares repurchased				2,400,000
Payments for shares repurchased		4,955,000	17,000,000
Juneau Exploration LLC [Member]
Related Party Transaction, Oil and Gas Properties [Abstract]
Annual advisory payment	2,000,000	2,000,000		2,000,000
First Rights Agreement [Line Items]	500,000	500,000		500,000
Contaro Advisory Agreement payment	$ 10,000	$ 10,000		10,000
Percent of Profit earned by Contaro	0.00%
Maximum [Member] | Contango Offshore Exploration LLC [Member]
Related Party Transaction, Oil and Gas Properties [Abstract]
Overriding royalty interest, employee benefit	3.33%	3.33%		3.33%
REX [Member]
Related Party Transaction, Oil and Gas Properties [Abstract]
Ownership interest in REX by related parties		32.30%
REX [Member] | Juneau Exploration LLC [Member]
Related Party Transaction, Oil and Gas Properties [Abstract]
Ownership interest in REX by related parties		34.40%