Note 3 - Gerrity Oil Joint Venture (Detail) (USD $)	12 Months Ended		1 Months Ended	6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Jul. 31, 2012 Gerrity Oil Joint Venture [Member]	Dec. 31, 2012 Gerrity Oil Joint Venture [Member]
Payments to Acquire Interest in Joint Venture (in Dollars)			$ 4,000,000
Joint Venture Ownership Interest Percentage			50.00%	50.00%
Business Acquisition, Membership Units Acquired			4,000,000
Business Acquisition, Percentage of Voting Interests Acquired			50.00%
Joint Venture Third Party Ownership Interest Percentage			50.00%
Joint Venture Third Party Percentage Of Voting Interests			50.00%
Business Acquisition, Cost of Acquired Entity, Transaction Costs (in Dollars)				4,000
Revenues (in Dollars)	394,000	0		394,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest (in Dollars)	$ (3,167,000)	$ (3,291,000)		$ 41,000