Accrued Expense - Additional Information (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Accounts Payable and Accrued Liabilities [Line Items]
Accrued expense	$ 149,341	$ 66,739
Accrued expense - related party	52,050	52,050
Clinical Trials
Accounts Payable and Accrued Liabilities [Line Items]
Accrued expense	149,341
MD Anderson Cancer Center
Accounts Payable and Accrued Liabilities [Line Items]
Accrued expense - related party	52,050
MD Anderson Cancer Center | Clinical Trials
Accounts Payable and Accrued Liabilities [Line Items]
Accrued expense - related party		$ 52,050