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Segment Reporting - Segment Reporting (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Notes to Financial Statements    
MHLLC Development and Operations Exploration $ 145,000 $ 314,000
MHLLC Development and Operations Interest Expense 49,000 102,000
MHLLC Development and Operations Other 15,000 27,000
MHLLC Development and Operations Pre-Tax Loss 209,000 443,000
Exploration Exploration 409,000 764,000
Exploration Interest Expense      
Exploration Other 388,000 700,000
Exploration Pre-Tax Loss 797,000 1,464,000
Corporate and Other Exploration      
Corporate and Other Interest Expense 24,000 39,000
Corporate and Other Other (683,000) (628,000)
Corporate and Other Pre-Tax Loss (659,000) (589,000)
Consolidated Exploration 554,000 1,078,000
Consolidated Interest Expense 73,000 141,000
Consolidated Other (280,000) 99,000
Consolidated Pre-Tax Loss 347,000 1,318,000
MHLLC Development and Operations Total Assets    14,028,000
MHLLC Capital Expenditures    1,044,000
Exploration Total Assets    1,687,000
Exploration Capital Expenditures    3,000
Corporate and Other Total Assets    8,917,000
Corporate and Other Capital Expenditures    9,000
Consolidated Total Assets    24,632,000
Consolidated Capital Expenditures    $ 1,056,000