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Legal Contingencies (Details Textual) (USD $)
 1 Months Ended 1 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 1 Months Ended
Dec. 31, 2011
Jan. 31, 2009
Sep. 30, 2007
Aug. 31, 2012
Aug. 31, 2012
Tampa Bay Nutraceutical Company [Member]
Sep. 30, 2007
Tampa Bay Nutraceutical Company [Member]
Aug. 31, 2012
Payment received from the parent company of Delta-T [Member]
Aug. 31, 2012
Amount of claim of indebt [Member]
Oct. 31, 2012
Amount Included in Cost of Revenue [Member]
Oct. 31, 2012
GPS [Member]
Dec. 31, 2011
GPS [Member]
Apr. 30, 2009
GPS [Member]
Jan. 31, 2009
GPS [Member]
Oct. 31, 2012
GPS [Member]
Oct. 31, 2012
GPS [Member]
Jan. 31, 2009
GPS [Member]
Procurement and Construction Services Related to Nebraska Project [Member]
Mar. 31, 2008
GPS [Member]
Procurement and Construction Services Related to Nebraska Project [Member]
Dec. 31, 2011
Delta T Corporation [Member]
Apr. 30, 2009
Delta T Corporation [Member]
Legal Contingencies (Textual) [Abstract]                                      
Amount of Mechanics Lien filed by GPS against the Altra Project                                 $ 23,800,000    
Net sale proceeds held by Bankruptcy Court                   5,500,000                  
Settlement payment made by GPS to Delta-T under the Project Close-Out Agreement                         3,500,000            
Amount of lien rights assigned by Delta-T to GPS                               21,200,000      
Arbitration award in favor of DCR against Delta-T                       6,800,000              
Lawsuit Filing Dates     September, 2007                             December, 2011 April, 2009
Damages sought           42,000,000         6,100,000                
Damages sought by DCR from GPS $6.1 million plus interest                                    
Allegations by Tampa Bay     Tampa Bay alleges compensatory damages in excess of $42 million                                
Provisions for Loss                           0 0        
Assignment to GPS of first receipts of Delta-T   3,500,000                                  
Amended amount of complaint filed against surety bonding company by DCR                                     6,800,000
Total payment made       1,875,000     275,000 1,800,000 1,600,000                    
Award sanctioned by court to VLI         $ 295,000