Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Significant Accounting Policies [Line Items]
Weighted-average shares subject to repurchase excluded from the weighted-average number of common shares outstanding	45,000	94,375
Officers [Member] \| Clinical Trial Services [Member]
Significant Accounting Policies [Line Items]
Related Party expenses	88,025	0

- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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