Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating Expenses:
Mineral property expenses	$ (969)	$ (1,552)	$ (1,751)	$ (2,321)
General and administrative expenses	(2,054)	(1,608)	(3,859)	(3,276)
Acquisition costs	422		(333)
Accretion of asset retirement obligations	(134)	(131)	(268)	(263)
Depreciation and amortization	(33)	(39)	(67)	(77)
Impairment of uranium properties	(17,968)		(17,968)
Total operating expenses	(20,736)	(3,330)	(24,246)	(5,937)
Non-Operating Income/(Expenses):
Loss on sale of marketable securities			(93)
Loss on extinguishment of convertible debt				(39)
Gain on sale of fixed assets	8		8
Gain on disposal of uranium properties		506		4,927
Interest income	172	186	346	238
Other income/(expense), net	99	(1)	109	16
Total other income	279	691	370	5,142
Net Loss	(20,457)	(2,639)	(23,876)	(795)
Other Comprehensive Loss
Unrealized fair value decrease on marketable securities	(26)	(591)	(1,056)	(161)
Transfer to realized loss upon sale of available-for sale securities			93
Comprehensive Loss	$ (20,483)	$ (3,230)	$ (24,839)	$ (956)
BASIC AND DILUTED LOSS PER SHARE	$ (0.51)	$ (0.11)	$ (.70)	$ (0.03)
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING	39,909,993	24,614,723	33,971,907	23,116,608