Loss Per Common Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Potential Common Shares Excluded from Calculation of Net Loss Per Common Share

The following table sets forth for the periods presented the potential common shares (prior to consideration of the treasury stock method) excluded from the calculation of net loss per common share because their inclusion would have been anti-dilutive:

	Outstanding at Years Ended December 31,
	2015		2014		2013
	(in thousands)
Options outstanding		4,796		5,817		4,297
Warrants outstanding		609		609		—
		5,405		6,426		4,297