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Summary of Significant Accounting Policies - Additional Information 4 (Detail) $ / shares in Units, $ in Thousands | 12 Months Ended |
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Dec. 31, 2016 USD ($) Segment Customer $ / shares shares | Dec. 31, 2015 USD ($) Customer shares | Dec. 31, 2014 USD ($) Customer shares | Sep. 06, 2016 $ / shares
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of operating segments | Segment | 1 |  |  |
General and administrative expenses reimbursements of overhead costs | $ 12,400 | $ 13,900 | $ 13,200 |
Performance multiplier, minimum | 0.00% |  |  |
Performance multiplier, maximum | 200.00% |  |  |
Warrants for Common Stock exercise price | $ / shares | $ 0.01 |  |  | $ 0.01
Interest costs, capitalized during period | $ 0 | $ 900 | $ 10,200 |
Interest paid in-kind | 11,860 |  |  |
Convertible Notes |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Interest paid in-kind | $ 11,860 |  |  |
Restricted Stock |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Shares of unvested restricted stock outstanding | shares | 354,986 | 314,048 | 241,505 |
Major Oil and Natural Gas Purchaser |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of major customers of oil and gas sales | Customer | 4 | 2 | 2 |
Major Oil and Natural Gas Purchaser One |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Percentage accounted of oil and gas sales | 42.00% | 52.00% | 53.00% |
Major Oil and Natural Gas Purchaser Two |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Percentage accounted of oil and gas sales | 17.00% | 25.00% | 35.00% |
Major Oil and Natural Gas Purchaser Three |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Percentage accounted of oil and gas sales | 14.00% |  |  |
Major Oil and Natural Gas Purchaser Four |  |  |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Percentage accounted of oil and gas sales | 12.00% |  |  |

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