Subsequent Events - Additional Information (Detail) - Asset Purchase Agreement [Member] - Ferring [Member] - ZOMAJET [Member] - Subsequent Event [Member] $ in Thousands	Oct. 10, 2017 USD ($) Installment
Subsequent Event [Line Items]
Total purchase price	$ 14,500
Number of installments paid for purchase price | Installment	4
Description of purchase price payment	The purchase price is to be paid in four installments consisting of the following: a $2.0 million upfront payment received upon entry into the Asset Purchase Agreement and the transfer of certain assets; a second installment of $2.75 million payable upon delivery of certain documentation and satisfaction of certain conditions primarily related to Product manufacturing; a third installment of $4.75 million payable upon satisfaction of certain conditions, including further document transfer, the successful completion of a regulatory audit by a notified body, and a pilot manufacturing run under Ferring’s supervision; and a final installment of $5.0 million upon Ferring’s receipt of the CE Mark needed to continue to commercialize the Product in certain territories and the final transfer of certain Product-related inventory, equipment and agreements to Ferring (the “Completion Date”), which is expected to occur by the end of 2018.
Upfront payment received upon transfer of assets	$ 2,000
Consideration receivable on criteria completion related to product manufacturing	2,750
Consideration receivable on criteria completion related to Audit and pilot manufacturing	4,750
Consideration receivable on criteria completion related to Product commercialization	$ 5,000