Basis of Presentation and Principles of Consolidation - Additional Information (Detail)	9 Months Ended
Sep. 30, 2012
Going Concern [Line Items]
Description of substantial doubt about entity's ability to continue as going concern	The Company does not currently generate commercial revenues and its burn rate during the nine months ended September 30, 2012, inclusive of the cost of preparations to commence the Phase IIb clinical study, was approximately $885,000 per month, thereby creating substantial doubt about the Company’s ability to continue as a going concern.

If there is a substantial doubt about an entity's ability to continue as a going concern for a reasonable period of time (generally a year from the balance sheet date), disclose: (a) pertinent conditions and events giving rise to the assessment of substantial doubt about the entity's ability to continue as a going concern for a reasonable period of time, (b) the possible effects of such conditions and events, (c) management's evaluation of the significance of those conditions and events and any mitigating factors, (d) possible discontinuance of operations, (e) management's plans (including relevant prospective financial information), and (f) information about the recoverability or classification of recorded asset amounts or the amounts or classification of liabilities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47214-110998

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