Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2012

Stock-Based Compensation

Summary of the option activity under the Company's Amended and Restated 2000 Stock Option and Equity Incentive Plan and 2010 Equity Incentive Plan (2010 Plan), referred to collectively as the "Plans,"

			Options Outstanding
	Available for Grant		Number of Shares		Weighted Average Exercise Prices
Balance at December 31, 2011	1,977		6,528		$	4.48
Additional shares authorized under the 2010 Plan	500		—		—
Options granted	(4	)	4		$	3.93
Options cancelled	111		(111	)	$	4.23
Options exercised	—		(34	)	$	2.85
Options expired	(55	)	—		—
Balance at March 31, 2012	2,529		6,387		$	4.50
Options granted	(430	)	430		$	3.23
Options cancelled	361		(361	)	$	6.70
Options exercised	—		(20	)	$	1.98
Options expired	(235	)	—		—
Balance at June 30, 2012	2,225		6,436		$	4.30
Options granted	(1,338	)	1,338		$	3.23
Options cancelled	356		(356	)	$	5.77
Options exercised	—		(78	)	$	2.29
Options expired	(209	)	—		—
Balance at September 30, 2012	1,034		7,340		$	4.04

Summary of the inducement grant option activity

	Options Outstanding
	Number of Shares		Weighted Average Exercise Prices
Balance at December 31, 2011	4,815		$	3.29
Granted	350		$	3.92
Cancelled	(103	)	$	1.54
Exercised	(111	)	$	1.54
Balance at March 31, 2012	4,951		$	3.41
Cancelled	(199	)	$	1.55
Exercised	(438	)	$	1.55
Balance at June 30, 2012	4,314		$	3.69
Cancelled	(248	)	$	1.55
Exercised	(597	)	$	1.55
Balance at September 30, 2012	3,469		4.21

Summary of significant ranges of outstanding and exercisable options, excluding restricted stock awards and restricted stock unit activity

	Options Outstanding						Options Exercisable
Range of Exercise Price	Number Outstanding	Weighted Average Remaining Contractual Life (in Years)	Weighted Average Exercise Price		Aggregate Intrinsic value		Number Exercisable	Weighted Average Remaining Contractual Life (in Years)	Weighted Average Exercise Price		Aggregate Intrinsic value
$1.50 - $3.09	2,995	3.79	$	2.30	$	5,224	1,408	2.72	$	1.85	$	3,087
$3.10 - $3.92	3,048	4.73	$	3.62	1,291		1,042	3.96	$	3.71	339
$3.93 - $5.61	3,216	3.48	$	4.96	—		2,756	3.43	$	5.03	—
$5.62 - $15.00	1,550	2.93	$	6.70	—		1,043	2.17	$	7.03	—
	10,809	3.84	$	4.09	$	6,515	6,249	3.15	$	4.43	$	3,426

Schedule of assumptions used in estimation of fair value of the share-based payment awards on the grant date

	Three Months Ended September 30,		Nine Months Ended September 30,
	2012	2011	2012	2011
Employee stock options:
Risk-free interest rate	0.2% – 0.6%	0.2% – 0.7%	0.2% – 0.8%	0.2% – 1.7%
Volatility	65.2% – 73.1%	40.7% – 61.3%	65.2% – 73.1%	40.7% – 63.8%
Expected life (years)	4.0	4.0	4.0	4.0
Dividend yield	0%	0%	0%	0%