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NET INCOME (LOSS) PER SHARE (Tables)
 6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Reconciliation of the numerators and denominators used in computing basic and diluted net income per share
The following is a reconciliation of the numerators and denominators used in computing basic and diluted net income (loss) per share (in thousands, except per share amounts):

 
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
 
2019
 
2018
 
2019
 
2018
Numerator:
 
 
 
 
 
 
 
 
Net income (loss)
 
$
(8,620
)
 
$
(7,758
)
 
$
(19,636
)
 
$
62,125

Denominator:
 
 
 
 
 
 
 
 
Weighted-average common stock outstanding, basic
 
31,578

 
30,527

 
31,335

 
30,116

  Dilutive effect of potential common shares:
 
 
 
 
 
 
 
 
  Stock options, RSUs, RSA and ESPP
 
—

 
—

 
—

 
958

Total shares, diluted
 
31,578

 
30,527

 
31,335

 
31,074

Basic net income (loss) per share
 
$
(0.27
)
 
$
(0.25
)
 
$
(0.63
)
 
$
2.06

Diluted net income (loss) per share
 
$
(0.27
)
 
$
(0.25
)
 
$
(0.63
)
 
$
2.00
Schedule of outstanding securities that were excluded from the computation of diluted net loss per share because their effect would have been anti-dilutive
These outstanding securities consisted of the following (in thousands):

 
 
June 30
 
 
2019
 
2018
Stock options
 
2,035
 
2,311

RSUs
 
753

 
1,205

RSAs
 
80

 
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