CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS AND SUPPLEMENTAL CASH FLOW - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Operating Activities:
Net loss	$ (2,775)	$ (20,457)	$ (5,949)	$ (23,876)
Reconciliation of net loss to cash used in operations:
Non-cash lease expense			7
Accretion of asset retirement obligations	30	134	156	268	$ 993
Amortization of note receivable discount			(299)	(337)
Loss on sale of marketable securities			720	93
Costs incurred for restoration and reclamation activities			(333)	(355)
Depreciation and amortization	25	33	48	67
Stock compensation expense			15	162
Common stock issued for purchase of lithium mineral interests				114
Common stock issued for consulting services				95
Other income				5
Impairment of uranium properties		17,968		17,968
Effect of changes in operating working capital items:
Decrease in prepaids and other			234	196
Increase (decrease) in payables and deferred credits			1,077	(490)
Net Cash Used In Operating Activities			(4,324)	(6,090)
Cash Flows From Investing Activities:
Deposit for sale of assets			1,500
Proceeds from the sale of marketable securities, net			536	476
Proceeds from disposal of property, plant and equipment				8
Proceeds from note receivable			750	1,089
Note advances for Alabama Graphite corporate merger				(1,547)
Net Cash Provided By Investing Activities			2,786	26
Cash Flows From Financing Activities:
Issuance of common stock, net			1,154	4,730
Payment of minimum withholding taxes on net share settlements of equity awards			(1)	(5)
Net Cash Provided By Financing Activities			1,153	4,725
Net decrease in cash, cash equivalents and restricted cash			(385)	(1,339)
Cash, Cash Equivalents and Restricted Cash, Beginning of Period			5,309	7,722	7,722
Cash, Cash Equivalents and Restricted Cash, End of Period	$ 4,924	$ 6,383	4,924	6,383	$ 5,309
Cash Paid During the Period for:
Interest			1	3
Supplemental Non-Cash Information for Investing and Financing Activities:
Securities received for payment of notes receivable - Laramide			750	750
Common stock issued for acquisition of Alabama Graphite				6,394
Stock options and warrants issued for acquisition of Alabama Graphite				89
Common stock issued for consulting services				95
Common stock issued for purchase of lithium mineral interests				114
Total Non-Cash Investing and Financing Activities for the Period			$ 750	$ 7,442