Stock Warrants - Additional Information (Detail) (USD $)	1 Months Ended			3 Months Ended		6 Months Ended	12 Months Ended			1 Months Ended
	Dec. 31, 2009	Jan. 01, 2009	Mar. 28, 2008	Jun. 30, 2012	Mar. 31, 2010	Jun. 30, 2012	Dec. 31, 2010	Mar. 24, 2010	Jan. 01, 2009	Jan. 22, 2010 Warrant C	Mar. 28, 2008 Series A Warrant	Mar. 28, 2008 Series B Warrant
Class of Warrant or Right [Line Items]
Stock units sold			9,117,647
Cash proceed from sale of stock			$ 15,500,000
Issued stock warrants to purchase company's common stock				3,874,522		3,874,522					1,940,885	1,933,637
Stock conversion ratio			1
Stock warrants life			5 years
Exercise of warrant, per share price											$ 10.20	$ 12.75
Stock warrants, expected life			5 years		3 years	2 years 9 months
Stock warrants, volatility			89.00%	54.00%		54.00%		57.00%
Stock warrants, risk free interest rate			2.51%	1.25%		1.25%		1.67%
Stock warrants, expected dividend yield			0.00%	0.00%		0.00%		0.00%
Cumulative effect adjustment of decreasing additional paid-in capital		6,020,000
Beginning retained earnings									2,792,017
Warrant liabilities		8,812,017
Fair value of the warrants	44,304,034
Loss from the change in fair value of warrants	35,492,017
Recognition of income from stock warrant							7,801,649
Reclassification of equity							36,502,385
Warrant shares issued for conversion										66,666
Common stock at exercise price, per share										$ 15.00
Conversion term										5 years
Exercisable days										180 days
Compensation expense				$ 216,158	$ 558,180	$ 432,316