Stock, Stock Options and Rights (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation Award Available for Grant

The following table presents shares authorized, available for future grant and outstanding under each of the Company’s plans at December 31, 2012:

	Authorized	Available	Outstanding
1996 Stock Incentive Program(1)	34,815	1,039	12,860
1998 Nonstatutory Stock Option Plan(2)	37	—	37
2008 Inducement Award Plan	1,800	184	1,316
2009 Incentive Plan(1)	19,041	758	18,022
2012 Incentive Plan	4,000	2,994	1,006
Total	59,693	4,975	33,241

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(1) Shares are only available for issuance under the 2012 Incentive Plan after reregistration.

(2) Shares will be retired upon cancellation.

Stock-Based Compensation by Payment Award

The following summarizes the Company’s stock option transactions for 2012, 2011 and 2010:

	Year ended December 31,
	2012				2011				2010
	Shares		Weighted- average exercise price		Shares		Weighted- average exercise price		Shares		Weighted- average exercise price
Outstanding at beginning of year	29,547		$	6.73	28,436		$	6.03	30,101		$	7.96
Granted	7,293		$	5.82	5,678		$	11.94	7,521		$	7.37
Exercised	(1,189	)	$	3.30	(2,738	)	$	6.43	(6,360	)	$	5.50
Forfeitures	(2,410	)	$	8.02	(1,829	)	$	12.51	(2,826	)	$	31.38
Outstanding at end of year	33,241		$	6.56	29,547		$	6.73	28,436		$	6.03
Exercisable at end of year	19,156		$	5.51	15,963		$	5.34	14,208		$	6.35

Stock-Based Compensation Exercise Price Range

The following table summarizes information concerning stock options outstanding and exercisable at December 31, 2012:

	Options Outstanding				Options Exercisable
Range of Exercise Price	Number Outstanding (in thousands)	Weighted- Average Remaining Contractual Life-Years	Weighted- Average Exercise Price		Number Exercisable (in thousands)	Weighted- Average Exercise Price
$ 1.69 – $ 4.00	4,863	4.96	$	2.60	4,716	$	2.61
$ 4.01 – $ 5.50	6,333	4.65	$	5.04	5,419	$	5.04
$ 5.51 – $ 6.75	10,534	7.73	$	6.14	4,266	$	6.39
$ 6.76 – $10.00	6,645	6.96	$	7.18	3,895	$	7.18
$10.01 – $13.99	4,866	8.20	$	12.54	860	$	12.54
$ 1.69 – $13.99	33,241	6.65	$	6.56	19,156	$	5.51

Stock Options and Employee Stock Purchase Plan, Valuation Assumptions

The following table summarizes the average estimates the Company used in the Black-Scholes option-pricing model during 2012, 2011 and 2010, to determine the fair value of employee stock options and employee ESPP rights granted during each period:

Stock Options	2012		2011		2010
Risk free interest rates	1.0	%	2.2	%	2.6	%
Expected life in years	5.00 years		4.99 years		4.79 years
Expected dividend yield	—	%	—	%	—	%
Expected volatility	63.4	%	60.2	%	60.6	%
Estimated annualized forfeiture rate	5.5	%	6.8	%	7.5	%
ESPP	2012		2011		2010
Risk free interest rates	0.1	%	0.1	%	0.2	%
Expected life in years	0.50 years		0.50 years		0.50 years
Expected dividend yield	—	%	—	%	—	%
Expected volatility	58.5	%	57.4	%	56.3	%
Estimated annualized forfeiture rate	4.0	%	4.0	%	4.0	%

Options, Grants in Period, Weighted Average Grant Date Fair Value

Based upon these assumptions, the Company has estimated the per share weighted-average grant fair value of its options granted during 2012, 2011, and 2010 as follows:

	Year ended December 31,
	2012		2011		2010
Weighted-average grant fair value	$	3.10	$	6.27	$	3.86

Schedule of Stock-Based Compensation

The table below summarizes the stock-based compensation expense for 2012, 2011 and 2010:

	Year ended December 31,
	2012		2011		2010
Stock-based compensation expense included in cost of goods sold	$	9,021	$	6,918	$	4,652
Operating expenses:
Research, development and engineering	9,261		8,492		6,337
Selling, general and administrative	10,943		9,672		6,571
Stock-based compensation expense included in operating expenses	20,204		18,164		12,908
Total stock-based compensation expense included in income from operations	$	29,225	$	25,082	$	17,560

Schedule of Employee Stock Purchase Plan Activity

During 2012, 2011 and 2010, the approximate number of shares of the Company’s common stock that was purchased under the ESPP was as follows:

	Year ended December 31,
	2012	2011	2010
Shares purchased	3,506	1,924	1,824