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Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Net property, plant and equipment | $ 35,409 | $ 46,916
Turkey [Member] |  |
Net property, plant and equipment | 17,979 | 17,990
Texas [Member] |  |
Net property, plant and equipment | 9,413 | 9,683
New Mexico [Member] |  |
Net property, plant and equipment | 7,806 | 19,102
Corporate [Member] |  |
Net property, plant and equipment | 211 | 141
Uranium Plant [Member] |  |
Net property, plant and equipment | 8,304 | 8,459
Uranium Plant [Member] | Turkey [Member] |  |
Net property, plant and equipment |  |
Uranium Plant [Member] | Texas [Member] |  |
Net property, plant and equipment | 8,304 | 8,459
Uranium Plant [Member] | New Mexico [Member] |  |
Net property, plant and equipment |  |
Uranium Plant [Member] | Corporate [Member] |  |
Net property, plant and equipment |  |
Mineral Rights and Properties Uranium [Member] |  |
Net property, plant and equipment | 25,774 | 37,070
Mineral Rights and Properties Uranium [Member] | Turkey [Member] |  |
Net property, plant and equipment | 17,968 | 17,968
Mineral Rights and Properties Uranium [Member] | Texas [Member] |  |
Net property, plant and equipment |  |
Mineral Rights and Properties Uranium [Member] | New Mexico [Member] |  |
Net property, plant and equipment | 7,806 | 19,102
Mineral Rights and Properties Uranium [Member] | Corporate [Member] |  |
Net property, plant and equipment |  |
Other Property Plant and Equipment [Member] |  |
Net property, plant and equipment | 1,331 | 1,387
Other Property Plant and Equipment [Member] | Turkey [Member] |  |
Net property, plant and equipment | 11 | 22
Other Property Plant and Equipment [Member] | Texas [Member] |  |
Net property, plant and equipment | 1,109 | 1,224
Other Property Plant and Equipment [Member] | New Mexico [Member] |  |
Net property, plant and equipment |  |
Other Property Plant and Equipment [Member] | Corporate [Member] |  |
Net property, plant and equipment | $ 211 | $ 141

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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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