CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 2,588	$ 4,077
Short-term investments	334	72
Trade receivables	380	546
Inventories	245	330
Value added tax receivable, net	5	400
Related party receivable	643
Prepaid expenses and other assets	578	451
Total current assets	4,773	5,876
Property, plant and equipment, net	9,235	11,125
Total assets	14,008	17,001
Current liabilities
Accounts payable and other accrued liabilities	1,224	1,144
Convertible note payable - related party, net		3,702
Derivative liability - related party		488
Deferred revenue		500
Other current liabilities	24	556
Total current liabilities	1,248	6,390
Asset retirement and reclamation liabilities	2,434	2,546
Warrant liability - related party	976	117
Warrant liability	922	93
Other long term liabilities	66	84
Total liabilities	5,646	9,230
Commitments and contingencies
Equity
Common stock, $.01 par value, 200,000,000 and 100,000,000 shares authorized; 89,020,041 and 53,335,333 shares issued and outstanding, respectively	889	534
Additional paid in capital	495,455	484,742
Accumulated deficit	(488,037)	(477,378)
Accumulated other comprehensive income (loss)	55	(127)
Shareholders' equity	8,362	7,771
Total liabilities and equity	$ 14,008	$ 17,001