The Company has acquired exclusive rights to develop patented rights, information rights and related know-how for OTO-313 and OTO-413 and potential future product candidates under licensing agreements with third parties. The licensing rights obligate the Company to make payments to the licensors for license fees, milestones and royalties. The Company is also responsible for patent prosecution costs, in the event such costs are incurred.

The Company may be obligated to make additional milestone payments under the Company’s intellectual property license agreements covering OTO-313 and OTO-413 as follows (in thousands):


Development	$	1,250
Regulatory		7,675
Commercialization		1,000
Total	$	9,925

In October 2014, the Company entered into an exclusive license agreement with Ipsen that enables the Company to use clinical and nonclinical gacyclidine data generated by Ipsen to support worldwide development and regulatory filings for OTO-313. Under this license agreement, the Company is obligated to pay Ipsen low single-digit royalties on annual net sales of OTO-313 by the Company or its affiliates or sublicensees, up to a maximum cumulative royalty totaling $10.0 million.