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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The increase in the fair value of plan assets from contributions made by the employer.

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The capitalized costs incurred during the period (excluded from amortization) 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: 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. Exploration costs also include costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, the maintenance of land and lease records, dry hole contributions and bottom hole contributions, costs of drilling and equipping exploratory wells and costs of drilling exploratory-type stratigraphic test wells.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended			6 Months Ended		12 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Jun. 30, 2012 Assets Held under Capital Leases	Jun. 30, 2012 Credit Concentration Risk Accounts Receivable Outstanding for less than three months	Dec. 31, 2011 Credit Concentration Risk Accounts Receivable Outstanding for less than three months	Jun. 30, 2012 Credit Concentration Risk Accounts Receivable Subsequently settled
Organization And Summary Of Significant Accounting Policies [Line Items]
Allowance for doubtful accounts
Cash and cash equivalents	71,994,771		71,994,771		78,526,060
Concentration risk percentage							84.00%	84.00%	16.00%
Property, plant and equipment, useful life						20 years
Contributions to the defined retirement plan	112,275	105,537	242,393	226,912
Shipping and handling costs for purchase of raw materials	0	167,657	80,607	281,228
Exploration costs		3,867,286		3,867,286
Impairment of idle plant and machinery		$ 3,873,087		$ 3,873,087
Anti-dilutive common stock equivalents	2,906,971	1,378,847	2,175,548	241,002