Net Loss Per Common Share (Tables)

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

Schedule of Potentially Dilutive Securities Excluded from Computation of Diluted Weighted Average Shares

The potential dilutive effect of these securities is shown in the chart below:

Three months ended March 31,
(in thousands)	2014		2013
Common stock warrants		2,443		2,779
Options to purchase common stock		22,243		20,664
Conversion of the Notes		25,000		—