Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses - Schedule of Accrued Expenses (Detail)

Accrued Expenses - Schedule of Accrued Expenses (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Payables And Accruals [Abstract]
Accrued professional fees	$ 736,728	$ 1,106,358
Accrued bonus compensation		422,226
Accrued payroll and benefits	136,565	99,548
Accrued research costs	41,600	29,682
Other	177,625	169,053
Total	$ 1,092,518	$ 1,826,867

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References + Details

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References + Details