Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Measurements [Abstract]

Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis

The following table summarizes fair value measurements by level at March 31, 2016 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	67,374	$	—	$	—		$	67,374
Warrant liability		—		—		(878	)		(878	)

Changes in carrying amounts of the warrant liability

The following table summarizes fair value measurements by level at December 31, 2015 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	20,673	$	—	$	—		$	20,673
Short-term investments		35,035		—		—			35,035
Warrant liability		—		—		(693	)		(693	)