Related Party - Additional Information (Detail) (USD $)	6 Months Ended	12 Months Ended	62 Months Ended			6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012	Jun. 30, 2012 Clinical Trials	Jun. 30, 2012 Technology Licenses	Jun. 30, 2012 MD Anderson Cancer Center Research and Development Expense	Jun. 30, 2011 MD Anderson Cancer Center Research and Development Expense	Jun. 30, 2011 MD Anderson Cancer Center Research and Development Expense Clinical Trials
Related Party Transaction [Line Items]
Cash paid to MD Anderson Cancer Center for expenses						$ 367,588	$ 25,000
Technology impairment charge	345,000	345,000	690,000			345,000
Accounts payable - related party	22,588	67,971	22,588			22,588
Accrued expense - related party	52,700	41,000	52,700	52,700				25,000
Accrued license payments - related party	$ 50,000	$ 39,538	$ 50,000		$ 50,000