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Date the warrants or rights are exercisable, in CCYY-MM-DD format.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The cash inflow associated with the amount received from entity's first offering of stock to the public.

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The cash inflow from the additional capital contribution to the entity.

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The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

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The cash inflow associated with the sale of equity securities classified as available-for-sale securities.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Per share or per unit amount of equity securities issued.

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The fair value of stock issued in noncash financing activities.

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Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

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Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders.

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Common stock registered for sale value.

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Prefunded warrants price per share.

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Sales commission percentage.

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Stockholders' Equity (Details Narrative) $ / shares in Units, $ in Thousands													3 Months Ended		12 Months Ended
	Aug. 07, 2018 shares	Jun. 14, 2018 USD ($) $ / shares shares	May 03, 2018 USD ($) shares	Apr. 23, 2018 shares	Apr. 23, 2018 shares	Apr. 18, 2018 USD ($) a shares	Sep. 27, 2017 USD ($) shares	Sep. 25, 2017 USD ($) shares	May 09, 2017 USD ($)	Apr. 14, 2017 USD ($)	Apr. 14, 2017 USD ($)	Mar. 09, 2017 USD ($)	Mar. 31, 2019 USD ($) shares	Mar. 31, 2018 USD ($) shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares
Proceeds from common stock													$ 415	$ 651	$ 8,715	$ 16,535
Fair value of shares issued															95	$ 325
Number of shares issued for services \| shares			172,727
Number of shares issued for services, value			$ 95												95
Option Agreement [Member]
Number of common stock issued \| shares						200,000
Fair value of shares issued						$ 114
Mining claims covering area \| a						3,000
ATM Offering [Member]
Net proceeds from direct offering									$ 8,000	$ 30,000	$ 30,000	$ 8,000
Proceeds from common stock													$ 6,100
Sales commission percentage										2.50%	2.50%
Number of common stock sold \| shares													488,685
ATM Offering [Member] \| January 31, 2019 [Member]
Proceeds from common stock															$ 5,900
Number of common stock sold \| shares															23,573,682
Common Stock [Member]
Number of common stock issued \| shares													57,205	20,802	32,018,551	9,926,396
Number of shares issued for services \| shares															172,727
Number of shares issued for services, value
Common Stock [Member] \| ATM Offering [Member]
Proceeds from common stock													$ 400		$ 4,500
Number of common stock sold \| shares													57,205		20,900,173
Available for future sales													$ 23,800		$ 23,900
Common stock registered for sale, value													$ 0		$ 3,100
Aspire Capital Fund LLC [Member]
Net proceeds from direct offering		$ 2,900
Number of common stock issued \| shares	4,825,509	3,717,773
Average price per shares issued \| $ / shares		$ 0.34
Proceeds from common stock		$ 1,300
Aspire Capital Fund LLC [Member] \| Common Stock Purchase Agreement [Member]
Net proceeds from direct offering								$ 22,000
Number of common stock issued \| shares		2,725,096					1,428,571	880,000							2,575,096
Proceeds from common stock		$ 1,500					$ 2,000								$ 1,300
Aspire Capital Fund LLC [Member] \| Common Stock Warrants [Member]
Number of warrants issued for common stock \| shares		4,968,518
Prefunded warrants price per share \| $ / shares		$ 0.33
Net proceeds of warrants		$ 1,600
Warrant purchase price per share \| $ / shares		$ 0.01
Warrant exercisable term		Aug. 07, 2018
Alabama Graphite [Member]
Number of common stock issued \| shares				232,504	11,625,210
Ownership percentage				100.00%	100.00%