Other non-operating income / (expense)

12 Months Ended

Dec. 31, 2016

Other non-operating income / (expense)

13 Other non-operating income / (expense)

Other non-operating income / (expense) consists of changes in the fair value of derivative financial instruments.

	Years ended December 31,
	2016		2015			2014
	in thousands
Other non-operating income:
Derivative gains	$	785	$	423		$	21

Total other non-operating income:	$	785	$	423		$	21

Other non-operating expense:
Derivative losses		—		(7,587	)		—

Total other non-operating expense:	$	—	$	(7,587	)	$	—

Other non-operating income/(expense)—net	$	785	$	(7,164	)	$	21

The Company recorded a gain of $0.5 million for the year ended December 31, 2016 and a net loss of $7.2 million for the year ended December 31, 2015 related to the derivative financial instruments issued as part of its collaboration with BMS and a gain of $0.3 million for the year ended December 31, 2016 (December 31, 2015: $0.0 million) related to warrants issued to Hercules (see note 3, "Fair value measurement").