Organization and Business - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended	74 Months Ended
	Jul. 31, 2012	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2013	Dec. 31, 2012	May 09, 2007
Organization and Nature of Operations [Line Items]
Percentage of Charge					50.00%
Impairment of License			$ 0	$ 345,000	$ 345,000	$ 690,000
Cash		1,927,226	1,927,226	162,440	952,252	1,927,226	534,046	0
Carrying value of the siRNA license				345,000
Proceeds from issuance of private placement	4,000,000	2,500,000
Proceeds form additional issuance of private placement		$ 4,000,000
Phase I clinical trial
Organization and Nature of Operations [Line Items]
Number patients benefited from Liposomal Grb-2 treatment		3	3			3