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- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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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.

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- Definition

The adjustment to expense previously capitalized costs of drilling exploratory wells when proved reserves are not found or when the entity obtains information that raises substantial doubt about the economic or operational viability of the project.

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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.

+ References

No definition available.

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PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
	Aug. 14, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Abandonment of mineral properties		$ 0	$ 0	$ 287
Nichols Ranch
Property, Plant and Equipment [Line Items]
Depreciation		$ 2,090	$ 2,050
Nichols Ranch, Hank and Doughstick Properties
Property, Plant and Equipment [Line Items]
Number of shares issued (in shares)	1,100
Total purchase price	$ 3,740
Minimum
Property, Plant and Equipment [Line Items]
Percentage Of sliding-scale gross proceeds production royalty	6.00%
Maximum
Property, Plant and Equipment [Line Items]
Percentage Of sliding-scale gross proceeds production royalty	8.00%