Note 9 - Note Payable and Line of Credit	12 Months Ended
Dec. 31, 2011
Debt Disclosure [Text Block]	Note 9 – Note Payable and Line of Credit On May 2, 2011, we entered into a Revolving Credit and Security Agreement (the “Credit Agreement”) with certain lenders (collectively, the “Lenders” and individually a “Lender”) and Prenante5, LLC, as agent for the Lenders (PrenAnte5, LLC, in such capacity, the “Agent”). The facility provides $10 million in financing to be made available for drilling projects on the Company’s North Dakota Bakken and Three Forks position. The facility will be available for a period of three years over which time we may draw on the line seven times, pay the line down three times, and terminate the facility without penalty one time. The facility sets the minimum total draw at $500,000 and requires Ante5, upon each draw, to provide the Lender with a compliance certificate that, along with other usual and customary financial covenants, states that Ante5 has at least twelve months interest coverage on its balance sheet in cash. We subsequently received our first draw of $2,000,000 on February 24, 2012. A note payable in the amount of $500,000 was paid in full on December17, 2010. Interest expense recognized on the above promissory note totaled $6,712 at December 31, 2010, of which $3,356 was forgiven, and $3,356 was paid with the settlement on December 17, 2010. Interest expense totaled $101,956 and $13,566 for the year ended December 31, 2011 and the period from April 9, 2010 (inception) to December 31, 2010, respectively. Interest expense consisted of finance charges related to obtaining our $10 million financing facility, including $87,084 of amortized warrant costs for the year ended December 31, 2011, and for the period from April 9, 2010 (inception) to December 31, 2010, $6,712 was incurred from the note payable and $6,854 was incurred on the line of credit from UBS. The line of credit from UBS was paid in full and closed with the proceeds of the sale of our auction rate securities on July 1, 2010.

Note 9 - Note Payable and Line of Credit

12 Months Ended

Dec. 31, 2011

Note 9 – Note Payable and Line of Credit

On May 2, 2011, we entered into a Revolving Credit and Security Agreement (the “Credit Agreement”) with certain lenders (collectively, the “Lenders” and individually a “Lender”) and Prenante5, LLC, as agent for the Lenders (PrenAnte5, LLC, in such capacity, the “Agent”). The facility provides $10 million in financing to be made available for drilling projects on the Company’s North Dakota Bakken and Three Forks position. The facility will be available for a period of three years over which time we may draw on the line seven times, pay the line down three times, and terminate the facility without penalty one time. The facility sets the minimum total draw at $500,000 and requires Ante5, upon each draw, to provide the Lender with a compliance certificate that, along with other usual and customary financial covenants, states that Ante5 has at least twelve months interest coverage on its balance sheet in cash. We subsequently received our first draw of $2,000,000 on February 24, 2012.

A note payable in the amount of $500,000 was paid in full on December17, 2010.

Interest expense recognized on the above promissory note totaled $6,712 at December 31, 2010, of which $3,356 was forgiven, and $3,356 was paid with the settlement on December 17, 2010.

Interest expense totaled $101,956 and $13,566 for the year ended December 31, 2011 and the period from April 9, 2010 (inception) to December 31, 2010, respectively. Interest expense consisted of finance charges related to obtaining our $10 million financing facility, including $87,084 of amortized warrant costs for the year ended December 31, 2011, and for the period from April 9, 2010 (inception) to December 31, 2010, $6,712 was incurred from the note payable and $6,854 was incurred on the line of credit from UBS.

The line of credit from UBS was paid in full and closed with the proceeds of the sale of our auction rate securities on July 1, 2010.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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