Accounts Payable and Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Accounts payable and accruals	$ 747	$ 310
Accrued employee compensation and benefits	1,270	1,246
Accounts payable and other accrued liabilities	2,017	1,556
Accrued vacation	200	200
Withholding taxes and benefits payable	1,100	1,000
KELTIP
Accrued employee compensation and benefits	300	400
Velardena properties
Accounts payable and accruals	200	100
Accrued employee compensation and benefits	500	300
VAT payable, net		100
Corporate, Exploration & Other
Accounts payable and accruals	500	$ 200
VAT payable, net	$ 200