Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

Aggregate number of common shares reserved for future issuance.

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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- Definition

Exercise prices for the option and warrant shares.

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- Definition

Number of replacement options and warrants.

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- Definition

Number of replacement options issued.

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Number of replacement options outstanding.

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Number of replacement warrants outstanding.

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Replacement options and warrants shares exchange rate.

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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended
	Apr. 30, 2018	Nov. 30, 2015	Mar. 31, 2019	Mar. 31, 2018	Apr. 18, 2019	Dec. 13, 2017	Jul. 18, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			$ 7,719	$ 80,673
Anatolia Energy Limited [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of replacement options issued		7,495
Debt instrument conversion price per share		$ 0.0001096
Number of replacement options outstanding			449
Alabama Graphite [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of replacement options outstanding			5,568
Number of replacement options and warrants	50,168
Replacement options and warrants shares exchange rate	$ 0.0016
Exercise prices for the option and warrant shares						$ 0.77809
Number of replacement warrants outstanding			11,440
2013 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock shares reserved for future issuance					66,278
2013 Omnibus Incentive Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock shares reserved for future issuance			66,278		66,000		20,000
Stock option vesting period			10 years