XML 152 R92.htm IDEA: XBRL DOCUMENT v3.22.4
INCOME AND MINING TAXES - Tax Effects of Temporary Differences (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:        
Net operating loss carryforward $ 65,174 $ 70,830    
Mineral properties 69,326 59,426    
Other temporary differences 22,433 29,009    
Total gross deferred tax assets 156,933 159,265    
Less: valuation allowance (149,342) (149,921) $ (154,298) $ (121,212)
Net deferred tax assets 7,591 9,344    
Deferred tax liabilities:        
Acquired mineral property interests (7,746) (9,344)    
Total deferred tax liabilities (7,746) $ (9,344)    
Total net deferred tax liability $ (155)