Ten Percent Convertible Redeemable Preferred Stock (Detail) (USD $)	Sep. 30, 2012	Sep. 30, 2011	Apr. 30, 2011	Sep. 30, 2012 Redeemable Preferred Stock	Dec. 31, 2011 Redeemable Preferred Stock
Temporary Equity [Line Items]
Redeemable preferred stock - face value				$ 7,060,230	$ 7,522,730
Accrued dividends				170,496	176,620
Unamortized discount	(1,400,000)		(828,340)	(1,367,642)	(2,179,094)
Redeemable preferred stock, net of discount		$ 6,594,341		$ 5,863,084	$ 5,520,256