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Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or 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Includes other kinds of accounts that have the general characteristics of demand deposits. 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Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting 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Abandonment and Impairment Expense","description":"The adjustment to expense previously capitalized costs of drilling exploratory wells when proved reserves are not found or when the entity obtains information that raises substantial doubt about the economic or operational viability of the project.","units":{"USD":[{"start":"2010-05-01","end":"2010-07-31","val":0,"accn":"0000939802-11-000259","fy":2012,"fp":"Q1","form":"10-Q","filed":"2011-09-14","frame":"CY2010Q2"},{"start":"2010-05-01","end":"2010-10-31","val":5000,"accn":"0000939802-11-000372","fy":2012,"fp":"Q2","form":"10-Q","filed":"2011-12-15"},{"start":"2010-08-01","end":"2010-10-31","val":5000,"accn":"0000939802-11-000372","fy":2012,"fp":"Q2","form":"10-Q","filed":"2011-12-15","frame":"CY2010Q3"},{"start":"2010-05-01","end":"2011-01-31","val":25000,"accn":"0000939802-12-000063","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-03-15"},{"start":"2010-11-01","end":"2011-01-31","val":20000,"accn":"0000939802-12-000063","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-03-15","frame":"CY2010Q4"},{"start":"2010-05-01","end":"2011-04-30","val":25000,"accn":"0000939802-12-000163","fy":2012,"fp":"FY","form":"10-K","filed":"2012-07-23","frame":"CY2010"},{"start":"2010-08-01","end":"2011-07-31","val":-25000,"accn":"0000939802-11-000259","fy":2012,"fp":"Q1","form":"10-Q","filed":"2011-09-14"},{"start":"2011-05-01","end":"2011-07-31","val":0,"accn":"0000939802-11-000259","fy":2012,"fp":"Q1","form":"10-Q","filed":"2011-09-14","frame":"CY2011Q2"},{"start":"2010-08-01","end":"2011-10-31","val":50000,"accn":"0000939802-11-000372","fy":2012,"fp":"Q2","form":"10-Q","filed":"2011-12-15"},{"start":"2011-05-01","end":"2011-10-31","val":25000,"accn":"0000939802-11-000372","fy":2012,"fp":"Q2","form":"10-Q","filed":"2011-12-15"},{"start":"2011-08-01","end":"2011-10-31","val":25000,"accn":"0000939802-11-000372","fy":2012,"fp":"Q2","form":"10-Q","filed":"2011-12-15","frame":"CY2011Q3"},{"start":"2010-08-01","end":"2012-01-31","val":50000,"accn":"0000939802-12-000063","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-03-15"},{"start":"2011-05-01","end":"2012-01-31","val":25000,"accn":"0000939802-12-000063","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-03-15"},{"start":"2011-11-01","end":"2012-01-31","val":0,"accn":"0000939802-12-000063","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-03-15","frame":"CY2011Q4"},{"start":"2010-08-01","end":"2012-04-30","val":50000,"accn":"0000939802-12-000163","fy":2012,"fp":"FY","form":"10-K","filed":"2012-07-23"},{"start":"2011-05-01","end":"2012-04-30","val":25000,"accn":"0000939802-12-000163","fy":2012,"fp":"FY","form":"10-K","filed":"2012-07-23","frame":"CY2011"}]}},"ExplorationExpense":{"label":"Exploration Expense","description":"\"Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or \"\"G&G\"\" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. 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