8. Common Stock

As of December 31, 2012 and March 31, 2013, the Company had 200.0 million shares of $0.01 par value common stock authorized. There were 95,825,000 and 95,948,000 shares of common stock issued and outstanding as of December 31, 2012 and March 31, 2013, respectively. The shares reserved for future issuance as of December 31, 2012 and March 31, 2013 consisted of the following:

(in thousands)	December 31, 2012	March 31, 2013

Common stock warrants	2,842	2,779
Options to purchase common stock	18,066	20,664
	20,908	23,443