Accounts Payable Due to Drilling Operator - Additional Information (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Payables And Accruals [Abstract]
Drilling operator charges incurred, but not paid	$ 111,788	$ 839,456
Credit Related to Refund of Prior Drilling Costs Previously Invoiced	$ 2,098,899