Net loss per share (Tables)

6 Months Ended

9 Months Ended

Jun. 30, 2012

Dec. 31, 2011

Net loss per share

Schedule of reconciliation of net loss to net loss applicable to common stockholders

	Three Months Ended June 30, 2012			Six Months Ended June 30, 2012			Period from April 5, 2011 (inception) to June 30, 2011			Period from April 5, 2011 (inception) to June 30, 2012
Net loss applicable to common stockholders	$	(3,234	)	$	(6,200	)	$	(410	)	$	(8,925	)
Weighted average number of common shares used in net loss per share applicable to common stockholders—basic and diluted		1,548			1,469			526			1,137
Net loss per share applicable to common stockholders—basic and diluted	$	(2.09	)	$	(4.22	)	$	(0.78	)	$	(7.84	)

	Period from April 5, 2011 (inception) to December 31, 2011
Net loss applicable to common stockholders		(2,725	)
Weighted average number of common shares used in net loss per share applicable to common stockholders—basic and diluted		909
Net loss per share applicable to common stockholders—basic and diluted		(3.00	)

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

	Three Months Ended June 30, 2012		Six Months Ended June 30, 2012		Period from April 5, 2011 (inception) to June 30, 2011		Period from April 5, 2011 (inception) to June 30, 2012
Series A Preferred Stock		3,065		3,065		—		3,065
Series B Preferred Stock		6,771		6,771		—		6,771
Outstanding stock options		687		687		—		687

	Period from April 5, 2011 (inception) to December 31, 2011
Series A Preferred Stock		3,065
Outstanding stock options		618