NET INCOME (LOSS) PER SHARE (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Reconciliation used in Computing Basic and Diluted Net Income (Loss) per Share

The following is a reconciliation of the numerators and denominators used in computing basic and diluted net loss per share.

(in thousands, except per share amounts)	Three months ended June 30,						Six months ended June 30,
	2018			2017			2018		2017
Numerator:
Net income (loss)	$	(7,758	)	$	(14,845	)	$	62,125	$	(27,710	)
Denominator:
Shares used in computation of basic net income (loss) per share (weighted average common shares outstanding)	30,527			29,193			30,116		29,109
Dilutive potential common shares:
Stock options, ESPP, restricted Stock and RSUs	—			—			958		—
Shares used in computation of diluted net income (loss) per share	30,527			29,193			31,074		29,109
Basic net income (loss) per share	$	(0.25	)	$	(0.51	)	$	2.06	$	(0.95	)
Diluted net income (loss) per share	$	(0.25	)	$	(0.51	)	$	2.00	$	(0.95	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

These outstanding securities consisted of the following:

	June 30,
	2018	2017
Standard and market condition stock options outstanding	2,310,808	3,879,034
Restricted stock awards outstanding	31,556	44,538
RSUs outstanding	1,204,971	641,320
ESPP	7,397	22,604