Component of Current Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accrued Liabilities Abstract
Payroll and related expenses	$ 4,613us-gaap_AccruedEmployeeBenefitsCurrent	$ 3,639us-gaap_AccruedEmployeeBenefitsCurrent
Legal expenses	224us-gaap_AccruedProfessionalFeesCurrent	339us-gaap_AccruedProfessionalFeesCurrent
Third party research expenses	5,898	900
Third party development expenses	1,000	1,313
Third party regulatory expenses	40	189
Other accrued liabilities	1,480us-gaap_OtherAccruedLiabilitiesCurrent	1,786us-gaap_OtherAccruedLiabilitiesCurrent
Total	$ 13,255	$ 8,166

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 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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