Related Party - Additional Information (Detail) (USD $)	3 Months Ended				6 Months Ended				86 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Dec. 31, 2013
Related Party Transaction [Line Items]
Accrued expense - related party	$ 52,050				$ 52,050				$ 52,050		$ 52,050
Accrued license payments - related party	50,000				50,000				50,000		100,000
Accounts payable - related party	3,213				3,213				3,213		0
Research and Development	517,040	[1]	156,036	[1]	624,681	[1]	557,135	[1]	6,469,166	[1]
Md Anderson Cancer Center [Member]
Related Party Transaction [Line Items]
Accrued expense - related party	52,050				52,050				52,050
SIRNA patent technology license			10,017
Md Anderson Cancer Center [Member] | Clinical Trials [Member]
Related Party Transaction [Line Items]
Accrued expense - related party											52,050
Accrued license payments - related party											100,000
Research and Development	3,213		22,050
Md Anderson Cancer Center [Member] | Research and Development Expense [Member]
Related Party Transaction [Line Items]
Cash paid to MD Anderson Cancer Center for expenses	$ 3,213		$ 32,067

[1] Research and development expense includes stock option expenses of $20,410 and $8,220 for the quarters ending 6/30/2014 and 6/30/2013, respectively; $27,032 and $19,633 for the six month periods ending 6/30/2014 and 6/30/2013, respectively; and $482,912 for the period from inception through 6/30/2014