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Consolidated Statements Of Income/(Loss) And Comprehensive Income/(Loss)
AUD in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
$ / shares
shares
Jun. 30, 2014
USD ($)
$ / shares
shares
Jun. 30, 2015
USD ($)
$ / shares
shares
Jun. 30, 2014
USD ($)
$ / shares
shares
Operating income and (expenses):        
Exploration, property evaluation and holding costs $ (984) $ (1,003) $ (1,959) $ (2,421)
Corporate administration (798) (1,088) (1,842) (2,363)
Depreciation and amortization (177) (224) (368) (441)
Gain on disposal of mineral property, net (Note 3)     1,958  
Total operating expense (1,959) (2,315) (2,211) (5,225)
Non-operating income/(expenses):        
Gain/(loss) on sale of marketable securities   9 12 22
Unrealized gain/(loss) on other investments (Note 2) (312) (632) (702) 1,422
Realized gain on other investments, net (Note 2)     (348) 155
Research and development grant (Note 10) 5,863   5,863  
Interest income 2 3 3 7
Interest expense       (78)
Other Nonoperating Income (Expense) (5) 16 25 (362)
Total non-operating income/(expense) 5,548 (604) 4,853 1,166
Income/(loss) before income taxes 3,589 (2,919) 2,642 (4,059)
Net income/(loss) 3,589 (2,919) 2,642 (4,059)
Other comprehensive gain/(loss):        
Unrealized fair value increase/(decrease) on available-for-sale securities (3) 9 (27) 62
Comprehensive gain/(loss) $ 3,586 $ (2,910) $ 2,615 $ (3,997)
Basic:        
Weighted average number of basic shares outstanding (in shares) | shares 82,390,217 82,275,217 82,390,217 82,275,217
Net income/(loss) per share, Basic | $ / shares $ 0.04 $ (0.04) $ 0.03 $ (0.05)
Diluted:        
Weighted average number of diluted shares outstanding (in shares) | shares 82,390,217 82,275,217 82,390,217 82,275,217
Net income/(loss) per share, Diluted | $ / shares $ 0.04 $ (0.04) $ 0.03 $ (0.05)