Common Shares Reserved for Issuance (Tables)

9 Months Ended

Sep. 30, 2013

Equity [Abstract]

Schedule of Stock by Class

As of September 30, 2013and December 31, 2012, we reserved shares of common stock for issuance as follows (in thousands):

	As of September 30,	As of December 31,
	2013	2012
Reserved under stock award plans	35,668	21,443
Conversion of preferred stock	—	73,747
Warrants to purchase convertible preferred stock	—	616
Warrants to purchase common stock	616	—
Total	36,284	95,806