Other Long Term Assets - Additional Information (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Other Noncurrent Assets [Line Items]
Deferred financing cost	$ 151,985	$ 134,518
Purchase Agreements
Other Noncurrent Assets [Line Items]
Deferred financing cost, non current	103,636	103,636
Other Long-term Assets
Other Noncurrent Assets [Line Items]
Deferred financing cost	63,013	63,013
Other Long-term Assets | $15 Million Purchase Agreement with Lincoln Park
Other Noncurrent Assets [Line Items]
Purchase agreement, aggregate shares opexa has right to sell	$ 15,000,000	$ 15,000,000