Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2013

Summary of Activity Related to Restricted Stock Units

A summary of activity related to restricted stock units under the Third Amended and Restated 2004 Equity Incentive Plan during the six month period ended June 30, 2013, is presented below:

	Unvested Shares
Outstanding at December 31, 2012		1,317,798
Granted		572,017
Forfeited		(29,597	)
Vested and Issued		(476,603	)
Vested and Unissued		(61,518	)
Outstanding at June 30, 2013		1,322,097