Condensed Consolidated Statements of Cash Flows and Supplemental Cash Flow Information (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating Activities:
Net loss	$ (27,012)	$ (3,778)
Reconciliation of net loss to cash used in operations:
Accretion of asset retirement obligations	401	395
Amortization of debt discount		30
Amortization of notes receivable discount	(507)	(553)
Amortization of non-cash investor relations fees	21	175
Loss on extinguishment of convertible debt		39
Loss on sale of marketable securities	484
Costs incurred for restoration and reclamation activities	(485)	(37)
Depreciation and amortization	94	104
Stock compensation expense	308	62
Common stock issued for purchase of lithium mineral interests	114
Common stock issued for consulting services	95
Gain on disposal of fixed assets	(11)	(4,927)
Impairment of uranium properties	17,968
Effect of changes in operating working capital items:
Decrease (increase) in receivables and other	105	(5)
Decrease (increase) in prepaids and other	90	(101)
Decrease in payables and deferred credits	(697)	(280)
Net Cash Used In Operating Activities	(9,032)	(8,876)
Cash Flows From Investing Activities:
Purchase of equipment		(100)
Proceeds from the sale of securities, net	834
Proceeds from disposal of property, plant and equipment	11	1,950
Proceeds from note receivable	1,134
Acquisition of Alabama Graphite, net of cash acquired	(1,547)
Net Cash Provided By Investing Activities	432	1,850
Cash Flows From Financing Activities:
Payments on borrowings		(5,500)
Issuance of common stock, net	5,917	16,395
Payment of minimum withholding taxes on net share settlements of equity awards	(5)	(1)
Net Cash Provided By Financing Activities	5,912	10,894
Net (decrease)/increase in cash, cash equivalents and restricted cash	(2,688)	3,868
Cash, cash equivalents and restricted cash, beginning of period	7,722	7,296
Cash, Cash Equivalents and Restricted Cash, End of Period	5,034	11,164
Cash paid during the period for:
Interest	7	227
Supplemental Non-Cash Information for Investing and Financing Activities:
Securities received for payment of notes receivable - Laramide	750
Securities received for asset disposal - Laramide		568
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 commitment fees		1,214
Common stock issued for consulting services	95	300
Common stock issued for purchase of lithium mineral interests	114
Total Non-Cash Investing and Financing Activities for the Period	$ 7,442	$ 2,082