4. Net Loss Per Share

The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share data).

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2017			2016			2017			2016
Net loss	$	(903	)	$	(19,899	)	$	(173	)	$	(25,404	)
Weighted average common basic shares		41,164			41,064			41,162			41,062
Effect of dilutive securities		—			—			—			—
Weighted average common dilutive shares		41,164			41,064			41,162			41,062
Basic and diluted net loss per share	$	(0.02	)	$	(0.48	)	$	(0.00	)	$	(0.62	)

On May 9, 2017, the Compensation Committee of the Board of Directors of the Company awarded 500 thousand restricted stock units to an executive officer. Such restricted stock units will vest, and an equal number of shares of common stock will be deliverable upon the third anniversary of the date of grant. Compensation expense related to the units of $590 thousand was calculated based upon the closing market price of the common stock on the date of grant ($1.18) and is recorded on a straight-line basis over the vesting period.

For the three and six months ended June 30, 2017, the computation of diluted net loss per share did not include 576 thousand restricted stock units having dilutive effects of 37 and 39 thousand shares, respectively, since their inclusion would have been anti-dilutive. Options to purchase 120 thousand shares and 93 thousand restricted stock units were not included in the computation of diluted net income per share for these periods, since the exercise price of the stock options was in excess of the average stock price for this period and the inclusion of the restricted stock units would have been anti-dilutive.

For the three and six months ended June 30, 2016, the computation of diluted net loss per share did not include options to purchase 825 thousand shares and 270 thousand restricted stock units, a dilutive effect of 180 thousand shares and 237 thousand shares, respectively, since their inclusion would have been anti-dilutive. Options to purchase 240 thousand shares were not included in the computation of diluted net loss per share for the three and six months ended June 30, 2016, since their exercise price was in excess of the average stock price for these periods.