Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Operating Expenses:
Mineral property expenses	$ (3,248)	$ (4,470)
General and administrative	(7,650)	(7,488)
Acquisition related expenses		(3,048)
Accretion of asset retirement obligations	(480)	(450)
Depreciation and amortization	(247)	(336)
Impairment of uranium properties	(1,673)	(960)
Total operating expenses	(13,298)	(16,752)
Non-Operating Income/(Expenses):
Loss on extinguishment of convertible debt	(3,322)
Interest expense	(2,800)	(2,645)
Commitment fees	(333)
Gain on disposal/exchange of uranium properties		4,268
Other income/(expense), net	148	(14)
Total other income/(expense)	(6,307)	1,609
Net Loss	(19,605)	(15,143)
Other Comprehensive Loss
Unrealized fair value decrease on available-for-sale securities	(49)	(67)
Transfer to realized loss upon sale of available-for-sale securities	116
Comprehensive Loss	$ (19,538)	$ (15,210)
BASIC AND DILUTED LOSS PER SHARE	$ (3.73)	$ (5.63)
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING	5,251,954	2,690,559