Accounts Payable and Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Accounts payable and accruals	$ 287	$ 344
Accrued employee compensation and benefits	1,113	880
Accounts payable and other accrued liabilities	1,400	1,224
Accrued vacation	300	300
Withholding taxes and benefits payable	800	600
VAT payable, net		100
KELTIP
Withholding taxes and benefits payable	600
Velardena properties
Accounts payable and accruals	100	100
Withholding taxes and benefits payable	200	200
Corporate, Exploration & Other
Accounts payable and accruals	$ 200	200
Withholding taxes and benefits payable		$ 300