Net Loss Per Common Share (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Schedule of Securities Excluded from Computation of Diluted Loss Per Share

Securities excluded from the calculation of diluted loss per share are shown in the chart below:

	Three Months Ended March 31,
(in thousands)	2016		2015
Outstanding options to purchase common stock		21,647		20,285
Common stock warrants		—		741
Conversion of the Convertible Notes		25,000		25,000