CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 4,966	$ 2,588
Short-term investments	242	334
Trade receivables	391	380
Inventories, net	267	245
Value added tax receivable, net	1	5
Related party receivable		643
Prepaid expenses and other assets	466	578
Total current assets	6,333	4,773
Property, plant and equipment, net	8,569	9,235
Total assets	14,902	14,008
Current liabilities
Accounts payable and other accrued liabilities	1,348	1,224
Deferred revenue	293
Other current liabilities	9	24
Total current liabilities	1,650	1,248
Asset retirement and reclamation liabilities	2,449	2,434
Deferred revenue	674
Warrant liability - related party		976
Warrant liability		922
Other long term liabilities	51	66
Total liabilities	4,824	5,646
Equity
Common stock, $.01 par value, 200,000,000 and 100,000,000 shares authorized; 92,005,448 and 89,020,041 shares issued and outstanding, respectively	919	889
Additional paid in capital	516,237	495,455
Accumulated deficit	(507,041)	(488,037)
Accumulated other comprehensive (loss) income	(37)	55
Shareholders' equity	10,078	8,362
Total liabilities and equity	$ 14,902	$ 14,008