Common Shares Reserved for Issuance (Tables)

6 Months Ended

Jun. 30, 2014

Equity [Abstract]

Schedule of Stock by Class

As of June 30, 2014and December 31, 2013, we had reserved shares of common stock for issuance as follows (in thousands):

	As of June 30,	As of December 31,
	2014	2013
Reserved under stock award plans	42,205	40,226
Warrants to purchase common stock	—	312
ESPP	3,273	2,500
Total	45,478	43,038