Collaboration Agreements (Tables)

9 Months Ended

Sep. 30, 2015

Collaboration Agreement [Abstract]

Collaboration revenue with related party

Sanofi collaboration revenue, as detailed below, consisted primarily of reimbursement for research and development and commercialization expenses that the Company incurred, partly offset by sharing of losses in connection with commercialization of antibodies, under the companies' Discovery and Preclinical Development Agreement ("Antibody Discovery Agreement") and License and Collaboration Agreement (each as amended), collectively referred to as the "Antibody Collaboration". In addition, in July 2015, the Company and Sanofi entered into a collaboration to discover, develop, and commercialize antibody-based cancer treatments in the field of immuno-oncology (the "IO Collaboration").

	Three Months Ended September 30,
Sanofi Collaboration Revenue	2015			2014
Antibody:
Reimbursement of Regeneron research and development expenses	$	205,114		$	140,497
Reimbursement of Regeneron commercialization-related expenses	53,341			1,688
Regeneron's share of losses in connection with commercialization of antibodies	(74,865		)	(12,830		)
Other	2,561			2,561
Total Antibody	186,151			131,916
Immuno-oncology:
Reimbursement of Regeneron research and development expenses	18,584			—
Other	20,000			—
Total Immuno-oncology	38,584			—
ZALTRAP®:
Regeneron's share of losses in connection with commercialization of ZALTRAP	—			(1,008		)
Reimbursement of Regeneron research and development expenses	—			1,261
Other	—			756
Total ZALTRAP	—			1,009
	$	224,735		$	132,925

	Nine Months Ended September 30,
Sanofi Collaboration Revenue	2015			2014
Antibody:
Reimbursement of Regeneron research and development expenses	$	585,450		$	405,212
Reimbursement of Regeneron commercialization-related expenses	89,145			7,062
Regeneron's share of losses in connection with commercialization of antibodies	(143,583		)	(17,125		)
Other	7,683			7,683
Total Antibody	538,695			402,832
Immuno-oncology:
Reimbursement of Regeneron research and development expenses	18,584			—
Other	20,000			—
Total Immuno-oncology	38,584			—
ZALTRAP:
Regeneron's share of losses in connection with commercialization of ZALTRAP	—			(4,912		)
Reimbursement of Regeneron research and development expenses	686			3,691
Other	15,236			4,417
Total ZALTRAP	15,922			3,196
	$	593,201		$	406,028

Collaboration revenue

The collaboration revenue the Company earned from Bayer HealthCare is detailed below:

	Three Months Ended September 30,
Bayer HealthCare Collaboration Revenue	2015		2014
EYLEA:
Regeneron's net profit in connection with commercialization of EYLEA outside the United States	$	130,510	$	85,351
Sales milestones	—		30,000
Cost-sharing of Regeneron EYLEA development expenses	1,827		4,394
Other	21,155		12,745
Total EYLEA	153,492		132,490
PDGFR-beta antibody:
Cost-sharing of REGN2176-3 development expenses	1,508		518
Other	2,596		2,845
Total PDGFR-beta	4,104		3,363
	$	157,596	$	135,853

	Nine Months Ended September 30,
Bayer HealthCare Collaboration Revenue	2015		2014
EYLEA:
Regeneron's net profit in connection with commercialization of EYLEA outside the United States	$	326,567	$	213,291
Sales milestones	15,000		75,000
Cost-sharing of Regeneron EYLEA development expenses	6,948		26,235
Other	50,685		34,490
Total EYLEA	399,200		349,016
PDGFR-beta antibody:
Cost-sharing of REGN2176-3 development expenses	8,688		1,657
Other	7,791		7,787
Total PDGFR-beta	16,479		9,444
	$	415,679	$	358,460