Accounts Receivable Due from Drilling Operator and Accounts Payable Due to Drilling Operator - Additional Information (Detail) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Accounts Payable And Accrued Liabilities Current [Line Items]
Amount due from drilling operator, charges current	$ 253,753	$ 0
Drilling operator charges incurred, but not paid	$ 0	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		$ 708,467