Property, Plant and Equipment - Additional Information (Detail) |
1 Months Ended | 3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|---|
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Feb. 28, 2017
USD ($)
License
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Sep. 30, 2017
USD ($)
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Sep. 30, 2016
USD ($)
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Sep. 30, 2017
USD ($)
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Sep. 30, 2016
USD ($)
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| Property, Plant and Equipment [Line Items] | |||||
| Depletion | $ 0 | $ 0 | |||
| Asset purchase | $ 85,100,000 | ||||
| Number of operated producing wells | 19 | ||||
| Development Expenses | |||||
| Property, Plant and Equipment [Line Items] | |||||
| Depreciation expense | 92,000 | $ 31,000 | 231,000 | $ 55,000 | |
| Australia | |||||
| Property, Plant and Equipment [Line Items] | |||||
| Reserves | $ 0 | $ 0 | |||
| United Kingdom | |||||
| Property, Plant and Equipment [Line Items] | |||||
| Number of non-operating interest in licenses | License | 2 | ||||
| X | ||||||||||
- Definition Number of non-operating interest in licenses held by entity. No definition available.
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- Definition Oil and gas reserve. No definition available.
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- Definition The noncash expense charged against earnings to recognize the consumption of natural resources. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The cash outflow to purchase long lived physical asset for use in the normal oil and gas operations and to purchase mineral interests in oil and gas properties not intended for resale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The total number of producing oil wells and oil wells capable of production, in which the entity owns an undivided working interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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