Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Significant Accounting Policies [Line Items]
Options outstanding	0	0
Non-vested stock options period granted expected to be recognized	4 years
Closing market price per share	$ 0.05
Total unrecognized estimated employee compensation cost related to non-vested stock options granted	$ 643,135
U.S. Treasury
Significant Accounting Policies [Line Items]
Non-vested stock options period granted expected to be recognized	5 years
Equity Incentive Plan Twenty Eleven
Significant Accounting Policies [Line Items]
Shares of common stock reserved under EIP	15,000,000
Options outstanding	19,491,667
Options outstanding as a percentage of outstanding shares	12.00%
Number of shares exercisable	10,913,542
Common stock shares available	6,453,333
Non-vested stock options period granted expected to be recognized	4 years