Ten Percent Convertible Redeemable Preferred Stock (Detail) (USD $)	Jun. 30, 2012	Apr. 30, 2011	Jun. 30, 2012 Redeemable Preferred Stock	Dec. 31, 2011 Redeemable Preferred Stock
Temporary Equity [Line Items]
Redeemable preferred stock - face value			$ 7,260,230	$ 7,522,730
Accrued dividends			176,773	176,620
Unamortized discount	(1,600,000)	(828,340)	(1,636,068)	(2,179,094)
Redeemable preferred stock, net of discount			$ 5,800,935	$ 5,520,256