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Mineral Properties - Capitalized Development Costs (Details) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Notes to Financial Statements |  |  |  |
Development expenditures | $ 441,000 | $ 543,000 | $ 768,000 | $ 763,000
Capitalized interest | 193,000 |  | 373,000 |
Property payments | 100,000 | 160,000 | 100,000 | 275,000
Capitalized depreciation | 8,000 | 6,000 | 16,000 | 6,000
Total capitalized costs | $ 742,000 | $ 709,000 | $ 1,257,000 | $ 1,044,000

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