Net loss per share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Earnings Per Share

The detail of the computation of basic and diluted earnings per share is as follows:

	THREE MONTHS ENDED MARCH 31,
	2015			2014
Numerator
Net loss	$	(6,412	)	$	(4,228	)
Accretion for liquidation preference on preferred stock		—			(1,133	)
Accretion for share issuance costs on preferred stock		—			(20	)
Tax expense on preferred stock		—			(100	)
Reversal of tax payable on preferred stock due to conversion of preferred stock		—			1,898
Extinguishment of remaining share issuance costs due to conversion of preferred stock		—			(439	)
Total loss attributable to common stockholders	$	(6,412	)	$	(4,022	)
Denominator
Weighted average shares used to compute basic and diluted net loss per common share		10,711,967			3,148,481
Net loss per share attributable to common stockholders – basic and diluted	$	(0.60	)	$	(1.28	)

Schedule of Antidilutive Securities Excluded from Computation of Basic and Diluted Net Loss Per Share

The following have been excluded from the computation of basic and diluted net loss per share as their effect would have been antidilutive:

	THREE MONTHS ENDED MARCH 31,
	2015		2014
Outstanding stock options		1,056,892		630,159
Common stock warrants		11,363		11,363
Total		1,068,255		641,522