Legal Contingencies (Details) (USD $)	1 Months Ended			1 Months Ended	3 Months Ended	1 Months Ended					3 Months Ended		1 Months Ended
	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]	Oct. 31, 2012 Amount of claim of indebt [Member]	Jul. 31, 2012 Amount Included in Cost of Revenue [Member]	Apr. 30, 2009 Delta-T Corporation [Member]	Jan. 31, 2009 Delta-T Corporation [Member]	Dec. 31, 2011 GPS [Member]	Apr. 30, 2009 GPS [Member]	Jan. 31, 2009 GPS [Member]	Apr. 30, 2013 GPS [Member]	Aug. 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]
Legal Contingencies (Textual) [Abstract]
GPS mechanics lien against Nebraska project				$ 1,800,000										$ 23,800,000
Net processed held by the bankruptcy court											5,500,000
Settlement payment made by GPS to Delta-T under the project close-out agreement										3,500,000
Assignment to GPS of first receipts of Delta-T							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
Amended amount of complaint filed against surety bonding company by DCR									6,800,000
Damages sought by DCR from GPS								$6.1 million plus interest, costs and attorney fees
Lawsuit Filing Dates		September, 2007				April, 2009		December, 2011
Total payment made			275,000									1,875,000
Amount included in cost of revenue					1,600,000
Provisions for Loss											0
Damages sought		42,000,000
Allegations by Tampa Bay		Tampa Bay alleges compensatory damages in excess of $42 million
Award sanctioned by court to VLI	$ 295,000