STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2013

STOCK-BASED COMPENSATION

Schedule of stock options activity

	Options Outstanding
	Number of Shares		Weighted– Average Exercise Price		Weighted– Average Remaining Contractual Term(in years)	Weighted– Average Grant–Date Fair Value		Aggregate Intrinsic Value(1)
Balance at December 31, 2012	3,929,910		$	9.03	7.75	$	3.84	$	(26,566	)
Options granted	—		$	—	—	$	—	$	—
Exercised	—		$	—	—	$	—	$	—
Canceled/forfeited	(153,977	)	$	5.77	—	$	3.06	$	—
Balance at June 30, 2013	3,775,933		$	9.16	7.20	$	3.88	$	(26,016	)
Vested and exercisable as of June 30, 2013	2,653,008		$	11.37	6.38	$	4.59	$	(24,142	)
Vested and exercisable as of June 30, 2013 and expected to vest thereafter	3,775,933		$	9.16	7.20	$	3.88	$	(26,016	)

(1) The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the closing stock price of $2.27 of the Company’s common stock on June 30, 2013.

Summary of restricted common stock activity

	Unvested Restricted Shares
	Number of Shares		Weighted– Average Grant–Date Fair Value
Unvested at December 31, 2012	128,060		$	7.46
Granted	131,749		$	2.75
Vested	(110,210	)	$	4.15
Canceled	—		$	—
Unvested at June 30, 2013	149,599		$	5.75
Expected to vest after June 30, 2013	149,599		$	5.75

Schedule of stock-based compensation expense

	Three Months EndedJune 30,				Six Months EndedJune 30,
	2013		2012		2013		2012
Cost of sales	$	—	$	1	$	—	$	1
Selling, general and administrative expense	$	756	$	1,495	$	1,106	$	2,961
Research and development expense	$	4	$	8	$	8	$	16
Total option exercise recognized tax benefit	—		—		—		—