Liquidity - (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Jul. 31, 2013 Subsequent Event [Member]	Sep. 30, 2014 Subsequent Event [Member] Maximum [Member]	Sep. 30, 2014 Subsequent Event [Member] Minimum [Member]	Sep. 30, 2014 Guadalupe de los Reyes gold/silver project [Member]
Net Cash Provided by (Used in) Operating Activities	$ (5,511)	$ (21,476)		$ 1,750	$ 1,500
Cash burn rate for future period	(5,511)	(21,476)		1,750	1,500
Anticipation sale amount to be receive subject to purchase option			$ 6,000			$ 500

Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 24

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

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