Stock-Based Compensation - Additional Information (Detail) (USD $)	1 Months Ended				3 Months Ended		6 Months Ended		144 Months Ended
	Jun. 30, 2012	May 31, 2012	Mar. 22, 2012	Mar. 28, 2012	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 6,292,000				$ 6,292,000		$ 6,292,000		$ 6,292,000
Unvested option	1,362,675				1,362,675		1,362,675		1,362,675
Unrecognized compensation cost, recognition period							3 years 8 months 12 days
Weighted-average grant date fair value of options grant					$ 1.72	$ 1.04	$ 1.72	$ 1.02
Stock Option expected to vest only upon achievement of certain market conditions						166,668		166,668
Annualized volatility							116.00%	121.00%	119.00%
Annualized risk free rate							0.91%	1.91%	1.98%
Expected life							5 years 7 months 6 days	5 years 1 month 6 days	5 years 1 month 6 days
Issuance of common stock to a consultant, shares		7,000	1,159,445	1,333,361
Issuance of common stock to a consultant, amount	68,800,000	16,000					16,000
Monte Carlo Option Pricing Model
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost						1,006,000		1,006,000
Unrecognized compensation cost, recognition period								5 years 6 months
Annualized volatility								110.00%
Annualized risk free rate								3.50%
Expected life								10 years
Scenario 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Option expected to vest only upon achievement of certain market conditions						83,334		83,334
Required Market capitalization for vesting stock option								5,000,000,000
Scenario 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Option expected to vest only upon achievement of certain market conditions						83,334		83,334
Required Market capitalization for vesting stock option								$ 10,000,000,000