Subsequent Events - Additional Information (Detail) (USD $)	9 Months Ended		65 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2010	May 09, 2007	Sep. 30, 2012 Common Stock	Sep. 30, 2012 Private Placement memorandum	Sep. 30, 2012 Private Placement memorandum Common Stock Minimum	Jun. 30, 2012 Private Placement memorandum Common Stock Minimum	Sep. 30, 2012 Private Placement memorandum Common Stock Maximum
Subsequent Event [Line Items]
Proceeds from Common Stock issued	$ 973,146	$ 1,533,425	$ 7,412,331
Cash	$ 332,862	$ 983,286	$ 332,862	$ 952,252	$ 238,565		$ 795,001	$ 1,700,000	$ 2,000,000	$ 1,000,000	$ 4,000,000