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Note 10 - Commitments and Contingencies (Details) (Specified Threshold [Member])
Jan. 04, 2012
North Brawley Project [Member]
  
Note 10 - Commitments and Contingencies (Details) [Line Items]  
Expected Generating Capacity 50
East Brawley Project [Member]
  
Note 10 - Commitments and Contingencies (Details) [Line Items]  
Expected Generating Capacity 50