Subsequent Event	3 Months Ended
Mar. 30, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENT	SUBSEQUENT EVENT On May 2, 2018, we entered into a license and collaboration agreement with Invenra, Inc. (“Invenra”), a privately-held company. Under the terms of the collaboration agreement, the parties will collaborate to discover and develop multispecific antibodies through the use of Invenra’s B-Body™ technology platform. Invenra will be responsible for antibody lead discovery and generation. We will lead Investigational New Drug enabling studies, manufacturing, clinical development in single-agent and combination therapy regimens, as well as future regulatory and commercialization activities. Also under the collaboration agreement, we will receive an exclusive, worldwide license to one preclinical asset (the “lead preclinical asset”), and pursue up to six additional discovery projects directed to three total discovery programs. In consideration for the exclusive worldwide license and other rights contained in the collaboration agreement, we will pay Invenra an upfront payment of $2.0 million. Invenra is eligible to receive payments of up to $131.5 million based on the achievement of specific development and regulatory milestones for a product containing the lead preclinical asset in the first indication. Upon successful commercialization of a product, Invenra is eligible to receive global milestone payments up to $325.0 million if certain sales thresholds are achieved as well as single digit tiered royalties on net sales of the approved product. We also have the right to initiate six additional discovery projects for development subject to an upfront payment of $2.0 million for each project as well as additional global milestone payments and royalties for any products that arise from these discovery efforts. Unless earlier terminated, the collaboration agreement has a term that continues, on a product-by-product and country-by-country basis, until the later of (i) ten years after the first commercial sale of such product in such country or (ii) expiration of patent claims covering the product in such country. We may terminate the collaboration agreement in its entirety or on a project-by-project basis at any time prior to commercialization, for any or no reason, upon thirty days’ written notice to Invenra. The collaboration agreement also may be terminated by either party for a material breach by the other, subject to notice and cure provisions.

SUBSEQUENT EVENT

On May 2, 2018, we entered into a license and collaboration agreement with Invenra, Inc. (“Invenra”), a privately-held company. Under the terms of the collaboration agreement, the parties will collaborate to discover and develop multispecific antibodies through the use of Invenra’s B-Body™ technology platform. Invenra will be responsible for antibody lead discovery and generation. We will lead Investigational New Drug enabling studies, manufacturing, clinical development in single-agent and combination therapy regimens, as well as future regulatory and commercialization activities. Also under the collaboration agreement, we will receive an exclusive, worldwide license to one preclinical asset (the “lead preclinical asset”), and pursue up to six additional discovery projects directed to three total discovery programs.

In consideration for the exclusive worldwide license and other rights contained in the collaboration agreement, we will pay Invenra an upfront payment of $2.0 million. Invenra is eligible to receive payments of up to $131.5 million based on the achievement of specific development and regulatory milestones for a product containing the lead preclinical asset in the first indication. Upon successful commercialization of a product, Invenra is eligible to receive global milestone payments up to $325.0 million if certain sales thresholds are achieved as well as single digit tiered royalties on net sales of the approved product. We also have the right to initiate six additional discovery projects for development subject to an upfront payment of $2.0 million for each project as well as additional global milestone payments and royalties for any products that arise from these discovery efforts.

Unless earlier terminated, the collaboration agreement has a term that continues, on a product-by-product and country-by-country basis, until the later of (i) ten years after the first commercial sale of such product in such country or (ii) expiration of patent claims covering the product in such country. We may terminate the collaboration agreement in its entirety or on a project-by-project basis at any time prior to commercialization, for any or no reason, upon thirty days’ written notice to Invenra. The collaboration agreement also may be terminated by either party for a material breach by the other, subject to notice and cure provisions.