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Variable Interest Entities (Details Textual) (USD $)
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2012
Project
Oct. 31, 2012
Project
Jan. 31, 2012
Variable Interest Entities (Textual) [Abstract]      
Operating losses associated with moxie project entities $ 352,000 $ 739,000  
Variable Interest Entity (Additional Textual) [Abstract]      
Number of natural gas-fired power plant projects under development 2 2  
Accrued Liabilities by Moxie projects to Moxie   730000 224000
Variable Interest Entity, Primary Beneficiary [Member]
     
Variable Interest Entities (Textual) [Abstract]      
Prospective amount of loan to Moxie projects 9,000,000 9,000,000  
Prospective amount of loan to Moxie Projects, maximum amount 10,000,000 10,000,000  
Maturity date for all current and future loans   Sep. 30, 2014  
Initial and additional development loans Moxie Project $ 4,800,000 $ 4,800,000  
Project development financing expire date   Dec. 31, 2013