Legal Contingencies (Details) (USD $)	1 Months Ended				3 Months Ended	1 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended				12 Months Ended	1 Months Ended
	Aug. 31, 2012	Dec. 31, 2011	Jan. 31, 2009	Sep. 30, 2007	Jul. 31, 2012	Sep. 30, 2007 Tampa Bay Nutraceutical Company [Member]	Aug. 31, 2012 Payment received from the parent company of Delta-T [Member]	Oct. 31, 2012 Amount of claim of indebt [Member]	Jan. 31, 2013 Amount Included in Cost of Revenue [Member]	Dec. 31, 2011 Delta T Corporation [Member]	Apr. 30, 2009 Delta T Corporation [Member]	Apr. 30, 2009 GPS [Member]	Jan. 31, 2009 GPS [Member]	Jan. 31, 2013 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]
Legal Contingencies (Textual) [Abstract]
Amount of claim of indebt								$ 1,800,000								$ 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
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
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
Amount included in cost of revenue					1,600,000				1,600,000
Award sanctioned by court to VLI	$ 295,000