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Note 5 - Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Accrued Liabilities [Table Text Block] |
|  | December 31, |
|  | 2012 |  |  | 2011 |
Payroll, bonus, and benefits |  | $ | 160 |  |  | $ | 150 |
Well-field, environmental studies, legal and consulting |  |  | 884 |  |  |  | 716 |
Stock-based compensation |  |  | 67 |  |  |  | 27 |
Other accrued expenses |  |  | 284 |  |  |  | 156 |
|  | $ | 1,395 |  |  | $ | 1,049 |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration