XML 58 R42.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Deferred tax assets:    
Loss carryovers $ 12,432 $ 12,178
Investment in Mineral Property 1,669 1,952
Capitalized Exploration Costs 877 1,205
Stock option compensation expense 150 13
Royalty 989
Unrealized loss on derivative securities 60 28
Other 135 135
Valuation allowance (15,099) (16,249)
Total deferred tax assets 224 251
Deferred tax liabilities:    
Unrealized gain on derivative securities
Unrealized gains on marketable equity securities 209 230
Other 15 21
Total deferred tax liabilities 224 251
Net deferred tax liabilities