EQUITY INCENTIVE PLANS (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]

Schedule of activity of options under stock plans

Stock Options	Number of Shares			Weighted Average Exercise Price
Outstanding as of December 31, 2009		5,215,189		$	6.04
Granted		1,548,650			3.74
Exercised		(83,023	)		3.42
Cancelled		(324,989	)		10.37
Outstanding as of December 31, 2010		6,355,827		$	5.29
Granted		1,675,950			6.69
Exercised		(728,811	)		5.41
Cancelled		(755,523	)		7.88
Outstanding as of December 31, 2011		6,547,443		$	5.34
Granted		1,453,468			7.72
Exercised		(278,545	)		4.85
Cancelled		(564,908	)		7.20
Outstanding as of December 31, 2012		7,157,458		$	5.70
Exercisable as of December 31, 2012		4,428,151		$	5.17
Weighted average grant-date fair value of options granted during the year ended December 31, 2012				$	4.67

Schedule of options outstanding

	Options Outstanding
							Options Exercisable
Range of Exercise Prices	Number Outstanding at December 31, 2012		Weighted Average Remaining Contractual Life		Weighted Average Exercise Price		Exercisable as of December 31, 2012		Weighted Average Exercise Price
$2.35–2.80		18,000		5.9	$	2.48		17,000	$	2.46
2.80–5.60		2,859,287		5.4		3.92		2,319,636		4.01
5.60–8.40		4,203,171		6.6		6.86		2,014,515		6.39
8.40–11.20		77,000		4.4		9.09		77,000		9.09
		7,157,458		6.1	$	5.70		4,428,151	$	5.17

Schedule of shares vested, expected to vest and exercisable

	Shares		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Vested and unvested expected to vest at December 31, 2012		6,991,763	$	5.70		6.1	$	6
Exercisable at December 31, 2012		4,428,151	$	5.17		4.8	$	6

Schedule of restricted stock activity

Restricted Stock	Number of Shares			Weighted Average Grant Date Fair Value
Unvested as of December 31, 2011		195,979		$	3.65
Granted		—			—
Vested		(107,634	)		3.74
Cancelled		(8,550	)		3.54
Unvested as of December 31, 2012		79,795		$	3.54