| Schedule of Non-controlling Interests [Table Text Block] |
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September 30, |
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2012 |
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March 31, 2012 |
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| Gerlach Geothermal LLC interest held by Gerlach Green Energy, LLC |
$ |
404,475
|
|
$ |
437,542
|
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| Oregon USG Holdings LLC interest held by Enbridge Inc. |
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32,788,439
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25,793,169
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| Raft River Energy I LLC interest held by Raft River I Holdings, LLC |
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22,551,783
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23,533,734
|
|
| |
$ |
55,744,697
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|
$ |
49,764,445
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