STOCK PLANS (Tables)

6 Months Ended

Jun. 30, 2017

Stockholders' Equity Note [Abstract]

Schedule of recognized stock-based compensation in consolidated statements of operations

The Company recognized stock-based compensation expense in its condensed consolidated statements of operations as follows (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Cost of goods sold	$	1,395	$	1,610	$	2,770	$	3,159
Research and development	647		1,015		1,304		1,908
Selling, general and administrative	5,303		5,040		10,670		11,088
Total	$	7,345	$	7,665	$	14,744	$	16,155

Stock-based compensation from:
Stock options (employee awards)	$	5,741	$	5,789	$	11,658	$	12,633
Stock options (consultant awards)	29		437		83		723
Restricted stock units (employee awards)	1,389		1,140		2,611		2,225
Employee stock purchase plan	186		299		392		574
Total	$	7,345	$	7,665	$	14,744	$	16,155

Schedule of the Company's stock option activity and related information

The following tables contain information about the Company’s stock option and restricted stock unit, or RSU, activity for the six months ended June 30, 2017:



Stock Options	Number of Options		Weighted Average Exercise Price
Outstanding at December 31, 2016	5,207,743		$	42.16
Granted	933,000		44.41
Exercised	(214,474	)	12.19
Forfeited	(286,978	)	52.05
Expired	(83,589	)	80.43
Outstanding at June 30, 2017	5,555,702		42.61



Restricted Stock Units	Number of Units		Weighted Average Grant Date Fair Value
Unvested at December 31, 2016	364,403		$	52.85
Granted	338,083		44.22
Vested	(96,928	)	54.22
Forfeited	(44,127	)	52.48
Unvested at June 30, 2017	561,431		47.41