11. Net loss per share attributable to common stockholders

The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
	(in thousands)
Numerator:
Net loss attributable to common stockholders, basic and diluted	$	(5,937	)	$	(3,734	)	$	(13,819	)	$	(9,182	)
Denominator:
Weighted average common stock, basic and diluted	36,724			35,621			36,558			35,486
Net loss per share attributable to common stockholders:
Basic and diluted	$	(0.16	)	$	(0.10	)	$	(0.38	)	$	(0.26	)

For the three and six months ended June 30, 2015 and 2014, we excluded all stock options and RSUs from the computation of diluted net loss per share due to the net loss for the period as the inclusion would be anti-dilutive.

On April 1, 2013, the Company approved a stock repurchase program to repurchase up to $10,000 of the Company’s common stock in the open market, exclusive of any commissions, markups or expenses. The stock repurchased will be retired and will resume the status of authorized but unissued shares of common stock. The Company did not repurchase any of our common stock during the six months ended June 30, 2015. As of June 30, 2015, the remaining approved amount for repurchases was approximately $5,180.