Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Third-party midstream services revenues	$ 1,555	$ 473
Plant and other midstream services operating	$ 2,341	1,027
Discount rate present value of future revenue from proved oil and gas reserves	10.00%
Full-cost ceiling impairment	$ 0	80,462
Capitalized general and administrative costs	5,600	2,000
Capitalized interest expense	$ 1,200	400
Reclassification from Other Income to Third-Party Midstream Services Revenue [Member] | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Third-party midstream services revenues		500
Reclassification from Lease Operating Expenses to Plant and Other Midstream Services Operating Expenses [Member] | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Plant and other midstream services operating		$ 1,000