STOCK PLANS (Tables)

6 Months Ended

Jun. 30, 2014

Stockholders' Equity Note [Abstract]

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

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

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2014		2013		2014		2013
Cost of goods sold	$	641	$	391	$	1,135	$	626
Research and development	2,137		509		3,714		1,465
Selling, general and administrative	2,759		1,325		4,663		2,359
Total	$	5,537	$	2,225	$	9,512	$	4,450

Schedule of information about the plans

The following tables contain information about the Company’s stock plans at June 30, 2014: 

Stock Incentive Plan	Awards Reserved for Issuance	Awards Issued	Awards Available for Grant
2007 Stock incentive plan	2,022,862	2,022,862	—
Amended and restated 2011 stock incentive plan	5,931,675	4,306,663	1,625,012
2014 Inducement plan	175,000	80,000	95,000
	8,129,537	6,409,525	1,720,012

Employee Stock Purchase Plan	Shares Reserved for Purchase	Shares Purchased	Shares Available for Purchase
2014 Employee stock purchase plan	500,000	—	500,000

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

The following table summarizes the Company’s stock option activity and related information for the six months ended June 30, 2014:

	Number of Shares		Weighted Average Exercise Price
Outstanding at December 31, 2013	3,840,038		$	13.50
Granted	1,458,200		77.92
Exercised	(326,290	)	10.28
Forfeited	(86,753	)	31.11
Expired	(237	)	15.24
Outstanding at June 30, 2014	4,884,958		$	32.64