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SUPPLEMENTAL FINANCIAL INFORMATION - Schedules of Components of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Supplemental Financial Information [Line Items]
Revenue (Note 10)	$ 8,702	$ 19,159	$ 33,704	$ 50,464
Uranium concentrates
Supplemental Financial Information [Line Items]
Revenue (Note 10)	8,687	19,159	33,664	49,795
Alternate feed materials processing and other
Supplemental Financial Information [Line Items]
Revenue (Note 10)	$ 15	$ 0	$ 40	$ 669

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[Line Items] for Supplemental Financial Information [Table]

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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