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Co-Promotion Agreement - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) Employee	Dec. 31, 2014 USD ($)
Co-Promotion Agreement [Line Items]
Promotion fee as a percentage gross margin	From the high single digits in 2014 to the low twenty percent level in 2018.
Net payables	$ 17,899	$ 8,525
Kowa Pharmaceuticals America
Co-Promotion Agreement [Line Items]
Net receivable		$ 600
Net payables	$ 400
Kowa Pharmaceuticals America | Minimum
Co-Promotion Agreement [Line Items]
Number of sales representatives | Employee	250

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- Definition

Co-Promotion Agreement [Line Items]

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Range of Percentage of Gross Margin Payable for Co-Promotion Agreement

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. 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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For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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