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Net Income (Loss) Per Share
 6 Months Ended
Jun. 30, 2017
Earnings Per Share [Abstract]  
Net Loss Per Share
Net Income (Loss) Per Share
Basic net income (loss) per share is computed by dividing net income (loss) for the period by the weighted-average number of shares outstanding during the period, less shares repurchased. In periods of net loss, all potential common shares are anti-dilutive, so diluted net loss per share equals the basic net loss per share. In periods of net income, diluted net income per share is computed by dividing net income for the period by the basic weighted-average number of shares plus any dilutive potential common stock outstanding during the period. Potential common stock includes the effect of outstanding dilutive stock options, restricted stock awards and restricted stock units computed using the treasury stock method. Any anti-dilutive weighted-average dilutive shares related to stock award plans are excluded from the computation of the diluted net income per share.
The basic and diluted net income (loss) per share calculation for the three and six months ended June 30, 2017 and 2016 is as follows:
 
Three months ended June 30,
 
Six months ended June 30,
 
2017
 
2016
 
2017
 
2016
 
(In thousands, except per share data)
Net income (loss)
$
837

 
$
(1,159
)
 
$
(9,917
)
 
$
(1,537
)
Weighted-average shares outstanding — basic
37,250

 
35,987

 
37,046

 
35,864

Effect of dilutive securities from stock award plans
1,120

 
—

 
—

 
—

Weighted-average shares outstanding — diluted
$
38,370

 
$
35,987

 
$
37,046

 
35,864

Net income (loss) per share - basic
$
0.02

 
$
(0.03
)
 
$
(0.27
)
 
$
(0.04
)
Net income (loss) per share - diluted
$
0.02

 
$
(0.03
)
 
$
(0.27
)
 
$
(0.04
)
 
 
 
 
 
 
 
 
Anti-dilutive weighted-average shares related to stock award plans
2,121

 
1,961

 
4,039

 
2,037