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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of Recurring Measurements of Fair Value of Assets and Liabilities

Recurring measurements of the fair value of assets and liabilities as of March 31, 2018 and December 31, 2017 are as follows:

		March 31, 2018																December 31, 2017
		Level 1				Level 2				Level 3				Total				Level 1				Level 2				Level 3				Total
Marketable equity securities:
Sutter Gold Mining Company		$	-			$	10			$	-			$	10			$	-			$	8			$	-			$	8
Anfield Resources, Inc.			788				-				-				788				868				-				-				868
Total		$	788			$	10			$	-			$	798			$	868			$	8			$	-			$	876
Commodity price risk derivatives		$	-			$	107				-			$	107				-			$	161				-			$	161
Outstanding warrant liability			-								930				930			$	-				-				1,200				1,200
Total		$	-			$	107			$	930			$	1,037							$	161			$	1,200			$	1,361

Schedule of Reconciliation of Changes in Assets and Liabilities Measured at Fair Value On a Recurring Basis

The following table presents a reconciliation of changes in liabilities measured at Level 3 fair value on a recurring basis for the period ended March 31, 2018 and the year ended December 31, 2017.

		Liabilities
		Warrants
		(Level 3)				Net
Fair value, December 31, 2017		$	1,200			$	1,200
Total net losses included in:
Other comprehensive loss			-				-
Fair value adjustments included in net loss:
Net unrealized gain on warrant fair value adjustment			(270	)			(270	)
Fair value, March 31, 2018		$	930			$	930

X

- Definition

Tabular disclosure of the amount of gains or losses for the period included in earnings or resulted in a change to net assets, have arisen from the use of significant unobservable inputs (level 3) to measure the fair value of assets, liabilities, and financial instruments classified in shareholders' equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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X

- References

No definition available.

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X

- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258

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