Common Stock (Tables)

9 Months Ended

Sep. 30, 2015

Equity [Abstract]

Schedule of Shares Reserved for Future Issuance

The shares reserved for future issuance as of September 30, 2015 and December 31, 2014 consisted of the following:

	As of		As of
(in thousands)	September 30, 2015		December 31, 2014
Options to purchase common stock		19,436		19,567
Common stock warrants		370		2,381
Conversion premium on the Notes		25,000		25,000