Net loss per share (Tables)

3 Months Ended

Mar. 31, 2013

Net loss per share

Schedule of amounts excluded from the calculation of diluted net loss per share, prior to the use of the treasury stock method, due to their anti-dilutive effect

The amounts in the table below were excluded from the calculation of diluted net loss per share, prior to the use of the treasury stock method, due to their anti-dilutive effect (in thousands):

	Three Months Ended		Period from April 5, 2011 (inception) to
	March 31, 2013	March 31, 2012	March 31, 2013
Series A Preferred Stock	—	3,065	—
Outstanding stock options and restricted stock units	1,808	661	1,808
Founders’ stock	1,481	2,139	1,481