Legal Contingencies - Additional Information (Detail) (USD $)		1 Months Ended		0 Months Ended	1 Months Ended			12 Months Ended		1 Months Ended				12 Months Ended
	Aug. 31, 2012 Payment Received from the Parent Company of Delta-T [Member]	Jul. 31, 2012 Amount Included in Cost of Revenue [Member]	Aug. 31, 2012 Amount of Claim of Indebt [Member]	Sep. 19, 2007 Tampa Bay Nutraceutical Company [Member]	Dec. 31, 2011 GPS [Member]	Apr. 30, 2009 GPS [Member]	Jan. 31, 2009 GPS [Member]	Jan. 31, 2014 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]	Apr. 30, 2009 Delta-T Corporation [Member]	Jan. 31, 2009 Delta-T Corporation [Member]	Jan. 31, 2014 Vitarich Laboratories Inc [Member] Tampa Bay Nutraceutical Company [Member]
Loss Contingencies [Line Items]
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
Lawsuit filing dates				September, 2007	December, 2011							April, 2009
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
Claims sought				42,000,000	6,100,000
Total payment made	275,000								1,875,000
Amount included in cost of revenue		1,600,000
Provision for loss								0
Allegations by Tampa Bay				Tampa Bay alleges compensatory damages in excess of $42 million
Accrued liability in financial statements for expected litigation costs														$ 1,304,000