Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Stock-based Compensation [Abstract]

Schedule of stock options and awards

	December 31,
	2012
Common stock shares available for grant		3,410,747
Common stock options outstanding		3,155,631
Restricted stock awards outstanding		44,000
Restricted stock units outstanding		708,651

Schedule of employee stock purchase plan

	Year Ended December 31, 2012
Shares purchased under ESPP		25,628
Average price of shares purchased under ESPP	$	4.77
Intrinsic value of shares purchased under ESPP	$	21,553

Schedule of stock options activity

	Number of Shares			Weighted Average Exercise Price		Weighted Average Fair Value Of Options Granted		Aggregate Intrinsic Value of Options Exercised (In thousands)
Outstanding at January 1, 2010		5,041,235		$	7.99
Granted		662,185			5.37	$	3.11
Exercised		(130,135	)		3.28			$	308
Cancelled		(1,572,759	)		11.67
Outstanding at December 31, 2010		4,000,526			6.26
Granted		429,963			7.11		4.07
Exercised		(560,132	)		4.09				2,485
Cancelled		(602,519	)		6.99
Outstanding at December 31, 2011		3,267,838			6.61
Granted		425,150			6.10		3.35
Exercised		(231,403	)		4.52				443
Cancelled		(305,954	)		7.10
Outstanding at December 31, 2012		3,155,631			6.65

Schedule of information regarding stock options outstanding

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)		Aggregate Intrinsic Value (In millions)
December 31, 2010
Options outstanding		4,000,526	$	6.26		6.39	$	5.5
Options vested and expected to vest using estimated forfeiture rates		3,798,092		6.32		6.25		5.1
Options exercisable		2,541,701		6.80		5.03		2.9
December 31, 2011
Options outstanding		3,267,838	$	6.61		5.53	$	1.3
Options vested and expected to vest using estimated forfeiture rates		3,151,950		6.62		5.44		1.3
Options exercisable		2,377,683		6.99		4.61		0.8
December 31, 2012
Options outstanding		3,155,631	$	6.65		5.24	$	3.5
Options vested and expected to vest using estimated forfeiture rates		3,019,979		6.67		5.17		3.4
Options exercisable		2,329,987		6.91		4.69		2.5

Additional Information regarding Options Outstanding

	Options Outstanding				Options Exercisable
Range of Exercise   Prices	Number Outstanding	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price		Number Exercisable	Weighted Average Exercise Price
$  2.70 - $3.81	66,130	5.45	$	2.82	63,091	$	2.81
3.85 - 3.85	600,000	6.87		3.85	475,000		3.85
4.03 - 5.53	374,882	5.81		5.01	255,010		4.88
5.58 - 6.11	363,434	4.99		5.81	299,309		5.85
6.12 - 6.39	383,000	6.55		6.20	17,000		6.23
6.41 - 6.98	342,830	4.99		6.77	266,227		6.82
6.99 - 8.18	328,527	2.27		7.13	310,190		7.08
8.61 - 9.04	393,528	4.03		8.80	393,528		8.80
9.20 - 15.12	203,300	5.04		11.50	150,632		12.30
16.57 - 16.57	100,000	4.74		16.57	100,000		16.57
$2.70 - $16.57	3,155,631	5.24	$	6.65	2,329,987	$	6.91

Schedule of restricted stock units activity

	Number      of Shares			Weighted Average Grant  Date     Fair Value		Fair Value of Released RSU’s     (In thousands)
Outstanding at January 1, 2010		198,055
Awarded		363,928		$	5.58
Released		(69,021	)			$	315
Forfeited		(75,039	)
Outstanding at December 31, 2010		417,923
Awarded		243,908			6.61
Released		(159,384	)				1,163
Forfeited		(94,682	)
Outstanding at December 31, 2011		407,765
Awarded		555,911			6.64
Released		(203,519	)				1,128
Forfeited		(51,506	)
Outstanding at December 31, 2012		708,651

Schedule of information regarding restricted stock units outstanding

	Number of        Shares		Weighted Average Remaining Contractual     Life (years)		Aggregate Intrinsic Value   (In millions)		Fair Value   (In  millions)
December 31, 2010
RSUs outstanding		417,923		1.13	$	2.8	$	2.8
RSUs vested and expected to vest using estimated forfeiture rates		330,038		1.00	$	2.2
December 31, 2011
RSUs outstanding		407,765		0.95	$	2.1	$	2.1
RSUs vested and expected to vest using estimated forfeiture rates		336,454		0.92	$	1.7
December 31, 2012
RSUs outstanding		708,651		1.09	$	4.9	$	4.9
RSUs vested and expected to vest using estimated forfeiture rates		588,170		1.05	$	4.0

Schedule of restricted stock awards activity

	Number      of Shares			Weighted Average Grant Date Fair Value		Total Fair Value of Awards Released (In thousands)
Outstanding at January 1, 2010		27,000		$	2.70
Awarded		22,500			5.59
Released		(31,500	)		3.11	$	147
Forfeited		0
Outstanding at December 31, 2010		18,000			5.59
Awarded		30,000			6.61
Released		(21,000	)		5.74		159
Forfeited		(9,000	)		6.61
Outstanding at December 31, 2011		18,000			6.61
Awarded		57,750			5.70
Released		(31,750	)		6.72		171
Forfeited		0
Outstanding at December 31, 2012		44,000			5.34

Schedule of stock option and employee stock purchase plan, valuation assumptions

	Options			Employee Stock Purchase Plan
	2012	2011	2010	2012	2011	2010
Expected life (in years)	4.5	4.5	5.2	0.5	0.5	0.5
Interest rate	0.7%	0.8%	1.4%	0.1%	0.2%	0.6%
Volatility	70%	72%	68%	62%	45%	80%
Dividend yield	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%

Schedule of stock-based compensation

	Year Ended December 31,
	2012		2011		2010
Income Statement Classifications	(In thousands)
Cost of product sales	$	0	$	0	$	10
Sales and marketing		547		526		722
Research and development		756		825		803
General and administrative		1,843		2,204		1,874
Total	$	3,146	$	3,555	$	3,409