Related Party - Additional Information (Detail) (USD $)	3 Months Ended				83 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2014		Dec. 31, 2013
Related Party Transaction [Line Items]
Accrued expense - related party	$ 52,050				$ 52,050		$ 52,050
Accrued license payments - related party	50,000				50,000		100,000
Accounts payable - related party	1,005				1,005		0
Research and Development	107,641	[1]	401,099	[1]	5,952,122	[1]
Md Anderson Cancer Center [Member]
Related Party Transaction [Line Items]
Accrued expense - related party	52,050				52,050
Md Anderson Cancer Center [Member] | Clinical Trials [Member]
Related Party Transaction [Line Items]
Accrued expense - related party	52,050				52,050		52,050
Accrued license payments - related party							100,000
Research and Development	21,719		15,000
Md Anderson Cancer Center [Member] | Research and Development Expense [Member]
Related Party Transaction [Line Items]
Cash paid to MD Anderson Cancer Center for expenses	$ 21,719		$ 15,000

[1] Research and development expense includes stock option expense of $6,623 and $11,414 for the quarters ending 3/31/2014 and 3/31/2013, respectively; and $462,500 for the period from inception through 3/31/2014. Research and development expense also includes amortization expense of $40,156 for the quarters ending 3/31/2014 and 3/31/2013; and $1,177,515 for the period from inception through 3/31/2014.