Notes Payable - Additional Information (Detail) (USD $)					1 Months Ended		3 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2011 Convertible notes payable	Aug. 31, 2010 Secured Debt	Aug. 31, 2010 Term note	Dec. 31, 2011 Term note	Mar. 31, 2011 Notes Payable Maturities 2018	Sep. 30, 2012 Notes Payable Maturities 2018	Dec. 31, 2011 Notes Payable Maturities 2018
Debt Instrument [Line Items]
Debt, face amount			$ 35,000	$ 6,000,000	$ 4,000,000			$ 14,000,000
LIBOR period for interest rate received					3 months
Interest over LIBOR rate					4.00%
Notes payable, current portion due		4,000,000				4,000,000
Interest accrues rate			6.00%					6.00%
Convertible, conversion price			$ 5.10
Long term notes payable, related party									10,303,683
Company paid to related parties							3,000,000
Long term notes payable	$ 7,303,683	$ 10,303,683						$ 7,303,683