Accrued Expenses - Summary of Accrued Expenses (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Payables And Accruals [Abstract]
Accrued expenses	$ 1,588,741	$ 356,345
Accrued research and development expenses	493,200	114,005
Accrued consulting and other professional fees	171,129	54,211
Accrued employee benefits	250,763	155,935
Accrued taxes	136,758	5,250
Accrued expenses total	$ 2,640,591	$ 685,746

Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. 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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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due. This amount is the total of current and noncurrent accrued income taxes.

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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).

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- 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).

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