v3.10.0.1

Revenue Recognition - Schedule of Disaggregated of Revenue by Major Source (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue | $ 32,562 | $ 25,608 | $ 91,660 | $ 76,932
Oil [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue | 18,160 | 12,464 | 52,547 | 38,666
NGLs [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue | 10,690 | 7,093 | 26,874 | 19,172
Gas [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue | 3,797 | 6,051 | 12,262 | 19,094
Oil, NGLs and Gas Sales [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue | 32,647 | $ 25,608 | 91,683 | $ 76,932
Commodity Derivatives Designated As Cash Flow Hedges [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue | $ (85) |  | $ (23) |

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