Accounts Payable Due to Drilling Operator - Additional Information (Detail) - USD ($)	Mar. 31, 2015	Dec. 31, 2014
Accounts Payable And Accrued Liabilities Current [Line Items]
Drilling operator charges incurred, but not paid	$ 13,032,589	$ 5,777,983
ASD Credit Agreement [Member]
Accounts Payable And Accrued Liabilities Current [Line Items]
Credit related to refund of prior drilling costs previously invoiced	$ 796,964	$ 708,467