Other Current Assets - Additional Information (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 $1.5 Million Purchase Agreement with Lincoln Park	Jan. 31, 2013 $1.5 Million Purchase Agreement with Lincoln Park	Mar. 31, 2013 $15 Million Purchase Agreement with Lincoln Park	Mar. 31, 2013 ATM Agreement Third Party	Mar. 31, 2013 Purchase Agreement Other Current Assets
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Implementation cost	$ 309,969	$ 341,166				$ 88,446	$ 221,523
Purchase agreement, aggregate shares opexa has right to sell	16,500,000		1,500,000	1,500,000	15,000,000
Advance payments to vendors and consultants	$ 220,374