Net Loss Per Common Share (Tables)

6 Months Ended

Jun. 30, 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:

	As of June 30,
(in thousands)	2014		2013
Options to purchase common stock		21,245		20,447
Common stock warrants		2,407		2,777
Conversion premium on the Notes		25,000		—