Common Stock

6 Months Ended

Jun. 30, 2014

Equity [Abstract]

Common Stock

8. Common Stock

As of June 30, 2014 and December 31, 2013, the Company had 200.0 million shares of $0.01 par value common stock authorized. There were approximately 104,513,000 and 102,523,000 shares of common stock issued and outstanding as of June 30, 2014 and December 31, 2013, respectively.

In February 2014, Hercules exercised warrants to purchase 302,143 shares of common stock for proceeds to the Company of $1.1 million.

The shares reserved for future issuance as of June 30, 2014 and December 31, 2013 consisted of the following:

(in thousands)	June 30, 2014		December 31, 2013
Options to purchase common stock		21,245		20,107
Common stock warrants		2,407		2,777
Conversion premium on the Notes		25,000		25,000