STOCKHOLDERS' EQUITY (Tables)

3 Months Ended

Mar. 31, 2012

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

Information with respect to options granted under all stock option plans for the three months ended March 31, 2012 is as follows:



	Shares		Weighted- Average Exercise Price	Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)
Options outstanding at December 31, 2011	5,367,145		$20.01
Granted (a)	1,081,700		$11.57
Exercised	(1,121	)	$9.55
Forfeited or canceled	(264,033	)	$20.39
Options outstanding at March 31, 2012 (b)	6,183,691		$18.52	4.80	$323
Options vested at March 31, 2012 or expected to vest	5,320,651		$18.57	4.77	$270
Options exercisable at March 31, 2012	1,936,210		$20.93	3.78	$55


(a)	Options granted during the three months ended March 31, 2012 included 47,500 options that had vesting based on performance conditions and 15,000 options that had vesting based on either market conditions or a combination of performance or market conditions.


(b)	Options outstanding at March 31, 2012 included 1,716,155 options that had vesting based on either performance conditions, or market conditions or a combination of performance or market conditions.

The following table sets forth the valuation weighted-average key assumptions and fair value results for stock options granted during the three months ended March 31, 2012 and 2011:



	Three Months Ended March 31,
	2012	2011
Expected dividend yield	0.00%	0.00%
Risk-free interest rate	0.89%	2.29%
Expected volatility	53.8%	41.6%
Expected life (in years)	4.55	4.77
Weighted-average fair value of options granted (per share)	$5.15	$7.58

During the three months ended March 31, 2012, there were no material proceeds from option exercises. During the three months ended March 31, 2011, the aggregate intrinsic value of stock options exercised was approximately $0.6 million and the cash received from the exercise of stock options totaled $1.0 million. The Company did not realize any actual tax benefit from tax deductions for stock option exercises during the three months ended March 31, 2012 or 2011 due to the full valuation allowance on the Company's U.S. deferred tax assets.

Non-vested restricted stock and restricted units

Information with respect to non-vested restricted stock units for the three months ended March 31, 2012 is as follows:



	Non-Vested Restricted Stock Units
	Shares		Weighted- Average Grant-Date Fair Value	Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in thousands)
Non-vested at December 31, 2011	822,033		$19.45
Granted (a)	287,500		$11.70
Vested	(119,773	)	$22.99
Forfeited	(3,856	)	$19.26
Non-vested at March 31, 2012 (b)	985,904		$16.76	2.21	$10,835
Expected to vest	786,946		$16.90	2.09	$8,649


(a)	Restricted stock units granted during the three months ended March 31, 2012 included 143,750 units that had vesting based on performance conditions.


(b)	Non-vested restricted stock units at March 31, 2012 included 582,250 units that had vesting based on either performance conditions, or market conditions or a combination of performance or market conditions.

The following table sets forth the valuation weighted-average key assumptions for restricted stock units with vesting based on market conditions or a combination of performance or market conditions granted during the three months ended March 31, 2011. No restricted stock units with vesting based on market conditions or a combination of performance or market conditions were granted during the three months ended March 31, 2012 .



	Three Months Ended March 31, 2011
Expected dividend yield	0.00%
Risk-free interest rate	4.11%
Expected volatility	41.4%
Expected life (in years)	3.00

The weighted-average grant date fair value of restricted stock units granted during the three months ended March 31, 2011 was $22.16. The total fair value of restricted stock units vested during the three months ended March 31, 2012 and 2011 was $1.3 million and $3.3 million, respectively.

Weighted-average key assumptions for shares issued under the ESPP

Employee Stock Purchase Plan

The Company's Second Amended and Restated 1996 Employee Stock Purchase Plan (the “ESPP”) offers the Company's shares for purchase at a price equal to 85% of the closing price on the applicable offering period termination date. Shares issued under the ESPP are considered compensatory under FASB ASC Subtopic 718-50, Compensation-Stock Compensation: Employee Stock Purchase Plans. Accordingly, the Company is required to assign fair value to, and record compensation expense for, share purchase rights granted under the ESPP.

The following table sets forth the valuation weighted-average key assumptions and fair value results for shares issued under the ESPP for the three months ended March 31, 2012 and 2011:



	Three Months Ended March 31,
	2012	2011
Expected dividend yield	0.00%	0.00%
Risk-free interest rate	0.06%	0.15%
Expected volatility	54.5%	40.0%
Expected life (in years)	0.24	0.24
Weighted-average fair value of shares issued (per share)	$1.64	$2.73

The following table sets forth the quantities and average prices of shares issued under the ESPP for the three months ended March 31, 2012 and 2011:



	Three Months Ended March 31,
	2012	2011
Shares issued under the ESPP	32,841	20,766
Average price of shares issued	$8.24	$14.15

A total of 579,666 shares remained available for issuance under the ESPP at March 31, 2012.

Allocated share-based compensation expense

Stock-Based Compensation Expense

The Company estimates forfeiture rates at the time awards are made based on historical turnover rates and applies these rates in the calculation of estimated compensation cost. At March 31, 2012, the Company's annualized estimated forfeiture rates were 0% for non-employee director awards, 10% for executive management awards and and 10% for awards to all other employees.

Stock-based compensation was included in the following captions in the Company's consolidated statements of operations for the three months ended March 31, 2012 and 2011, respectively (in thousands):



	Three Months Ended March 31,
	2012		2011 (Revised)
Cost of products revenues	$	94	$	139
Cost of services revenues	157		268
Research and development expenses	306		472
Marketing and selling expenses	1,261		1,218
General and administrative expenses	1,315		2,036
	$	3,133	$	4,133

- Definition

Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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- Definition

Tabular disclosure of the description of the plan, the basis for determining contributions, including the employee groups covered, and the nature and effect of significant matters affecting comparability of information for all periods presented. For leveraged ESOPs and pension reversion ESOPs, the disclosure may include the basis for releasing shares and how dividends on allocated and unallocated shares are used. Disclosure may also include a description of the accounting policies followed for ESOP transactions, including the method of measuring compensation, the classification of dividends on ESOP shares, and the treatment of ESOP shares for EPS computations. If the employer has both old ESOP shares for which it does not adopt the latest guidance and new ESOP shares for which the new guidance is required, the accounting policies for both blocks of shares may be described. Disclosure may also include he amount of compensation cost recognized during the period, the number of allocated shares, committed-to-be-released shares, and suspense shares held by the ESOP at the balance-sheet date, the fair value of unearned ESOP shares at the balance-sheet date for shares accounted for under the latest guidance, the existence and nature of any repurchase obligation, including disclosure of the fair value of the shares allocated as of the balance sheet date, which are subject to a repurchase obligation.

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