Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Operating Expenses:
Mineral property expenses	$ (1,552)	$ (1,138)	$ (2,321)	$ (1,869)
General and administrative	(1,608)	(2,007)	(3,276)	(4,152)
Accretion of asset retirement obligations	(131)	(120)	(263)	(240)
Depreciation and amortization	(39)	(50)	(77)	(132)
Impairment of uranium properties		(534)		(534)
Total operating expenses	(3,330)	(3,849)	(5,937)	(6,927)
Non-Operating Income/(Expenses):
Loss on extinguishment of convertible debt			(39)
Interest income/(expense)	186	(780)	238	(1,523)
Commitment fees				(333)
Loss on sale of marketable securities				(116)
Gain on disposal of uranium properties	506		4,927
Other income/(expense), net	(1)	22	16	19
Total other income/(expense)	691	(758)	5,142	(1,953)
Net Loss	(2,639)	(4,607)	(795)	(8,880)
Other Comprehensive Loss
Unrealized fair value decrease on marketable securities	(591)		(161)	(49)
Transfer to realized loss upon sale of available-for-sale securities				116
Comprehensive Loss	$ (3,230)	$ (4,607)	$ (956)	$ (8,813)
BASIC AND DILUTED LOSS PER SHARE	$ (0.11)	$ (0.75)	$ (0.03)	$ (1.60)
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING	24,614,723	6,151,858	23,116,608	5,559,877