Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Stock Based Compensation Expense Recognized

	2012		2011		2010
Cost of sales	$	41	$	68	$	19
Research and development expense		568		668		568
Selling, general and administrative expense		4,461		3,133		1,444
Total	$	5,070	$	3,869	$	2,031

1995 Stock Option Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Stock Based Compensation, Stock Option Activity

		Weighted-
		Average
		Exercise
	Shares	Price
Options outstanding at December 31, 2009	784,700	$	4.28
Options exercised	(105,871)		2.01
Options forfeited	—		—
Options expired	(337,229)		4.43
Options outstanding at December 31, 2010	341,600	$	4.83
Options exercised	(215,850)		4.68
Options forfeited	—		—
Options expired	(10,800)		5.31
Options outstanding at December 31, 2011	114,950	$	5.05
Options exercised	(40,800)		2.50
Options forfeited	—		—
Options expired	(13,600)		5.83
Options outstanding at December 31, 2012	60,550	$	6.59
Options exercisable and expected to become exercisable at December 31, 2012	60,550	$	6.59
Options exercisable at December 31, 2012	60,550	$	6.59

Schedule Of Stock Based Compensation, Stock Options Outsdanting And Exercisable

	Weighted-
	Average
	Remaining	Aggregate
	Contractual	Intrinsic Value
	Term (Years)	(in thousands)
Options outstanding at December 31, 2012	0.80	$	7
Options exercisable and expected to become exercisable at December 31, 2012	0.80	$	7
Options exercisable at December 31, 2012	0.80	$	7

Schedule Of Stock Based Compensation, Stock Options Outstanding By Exercise Price Range

		Weighted-	Weighted-		Weighted-
		Average	Average		Average
		Remaining	Exercise		Exercise
	Number	Contractual	Price	Number	Price
Range of Exercise Prices	Outstanding	Term (Years)	(Outstanding)	Exercisable	(Exercisable)
$3.50	2,750	0.41	$ 3.50	2,750	$ 3.50
$6.50	15,000	0.89	$ 6.50	15,000	$ 6.50
$6.76	37,800	0.74	$ 6.76	37,800	$ 6.76
$7.32	5,000	1.21	$ 7.32	5,000	$ 7.32
	60,550	0.80	$ 6.59	60,550	$ 6.59

2004 Equity Incentive Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Stock Based Compensation, Stock Option Activity

		Weighted-
		Average
		Exercise
	Shares	Price
Options outstanding at December 31, 2009	4,796,611	$	3.32
Options granted	1,159,500		3.37
Options exercised	(353,091)		2.32
Options forfeited	(639,687)		2.60
Options expired	(22,988)		5.51
Options outstanding at December 31, 2010	4,940,345	$	3.21
Options granted	2,762,181		7.35
Options exercised	(2,163,266)		3.04
Options forfeited	(639,043)		4.51
Options expired	—		—
Options outstanding at December 31, 2011	4,900,217	$	5.44
Options granted	2,006,950		5.86
Options exercised	(587,594)		2.95
Options forfeited	—		—
Options expired	(557,551)		6.26
Options outstanding at December 31, 2012	5,762,022	$	5.76
Options exercisable and expected to become exercisable at December 31, 2012	5,112,683	$	5.70
Options exercisable at December 31, 2012	2,630,266	$	5.07

Schedule Of Stock Based Compensation, Stock Options Outsdanting And Exercisable

	Weighted-
	Average
	Remaining	Aggregate
	Contractual	Intrinsic Value
	Term (Years)	(in thousands)
Options outstanding at December 31, 2012	7.76	$	5,421
Options exercisable and expected to become exercisable at December 31, 2012	7.60	$	5,222
Options exercisable at December 31, 2012	6.54	$	4,172

Schedule Of Stock Based Compensation, Stock Options Outstanding By Exercise Price Range

		Weighted-	Weighted-		Weighted-
		Average	Average		Average
		Remaining	Exercise		Exercise
	Number	Contractual	Price	Number	Price
Range of Exercise Prices	Outstanding	Term (Years)	(Outstanding)	Exercisable	(Exercisable)
$1.49 - $3.60	1,206,682	5.81	$ 2.79	1,060,909	$ 2.77
$3.90 - $5.82	1,259,000	8.39	$ 5.36	471,076	$ 5.12
$5.85 - $6.08	1,213,185	9.03	$ 5.98	186,788	$ 6.03
$6.11 - $8.36	1,421,218	7.50	$ 7.15	656,330	$ 7.12
$8.54 - $9.02	661,937	8.35	$ 8.55	255,163	$ 8.56
	5,762,022	7.76	$ 5.76	2,630,266	$ 5.07

Stock Options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Stock Options Valuation Assumptions

	2012	2011	2010
Employee and Director Stock Options
Risk-free interest rate	0.51 – 0.78%	0.77 – 1.99%	1.51 – 2.62%
Dividend yield	None	None	None
Expected option term (in years)	4.50 - 4.54	4.54 - 4.84	5.19 - 5.44
Expected stock price volatility	64.1 – 67.5%	73.9 – 76.4%	69.2 - 72.1%

Stock Purchase Rights [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Stock Options Valuation Assumptions

	2012	2011	2010
Employee and Director Stock Options
Risk-free interest rate	0.12 – 0.16%	0.05 – 0.44%	0.20 – 0.78%
Dividend yield	None	None	None
Expected option term (in years)	0.5	0.5 – 2.0	0.5 – 2.0
Expected stock price volatility	35.6 – 44.3%	60.1 – 76.6%	55.7 – 90.9%