Accounts Payable and Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounts payable and accruals	$ 536	$ 358
Accrued employee compensation and benefits	957	1,344
Accounts payable and other accrued liabilities	1,493	1,702
Accrued vacation	300	200
Withholding taxes and benefits payable	700	400
KELTIP
Accrued employee compensation and benefits		400
Velardena properties
Accounts payable and accruals	200	200
Accrued employee compensation and benefits	500	600
VAT payable, net		100
Corporate, Exploration & Other
Accounts payable and accruals	300	$ 200
VAT payable, net	$ 100