STOCKHOLDERS' EQUITY (Notes)

6 Months Ended

Jun. 30, 2012

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

Stockholders' Equity

STOCKHOLDERS' EQUITY

Stock Incentive Plans

Under its stock incentive plans, the Company may grant stock awards or options to purchase the Company's common stock to employees, officers, directors (subject to certain restrictions) and consultants, generally at the market price on the date of grant. Current option grants become exercisable over various periods, typically four years for employees and one year for non-employee directors, and have a maximum term of seven years. Time-based restricted stock and restricted stock unit awards typically vest over four years. Shares available for issuance under the Company's Amended and Restated 2005 Stock Incentive Plan, which is the only plan the Company currently makes grants from, totaled 1,768,093 at June 30, 2012, including 115,364 shares that may alternatively be issued as awards of restricted stock or restricted stock units.

Information with respect to options granted under all stock option plans for the six months ended June 30, 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)	1,899,150		$11.29
Exercised	(1,121	)	$9.55
Forfeited or canceled	(523,713	)	$18.00
Options outstanding at June 30, 2012 (b)	6,741,461		$17.71	4.58	$5,918
Options vested at June 30, 2012 or expected to vest	5,848,614		$17.77	4.55	$5,726
Options exercisable at June 30, 2012	2,148,832		$20.78	3.58	$178

(a) Options granted during the six months ended June 30, 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 June 30, 2012 included 1,653,655 options that had vesting based on either performance conditions, 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 six months ended June 30, 2012 and 2011:

	Six Months Ended June 30,
	2012	2011
Expected dividend yield	0.00%	0.00%
Risk-free interest rate	0.95%	2.21%
Expected volatility	52.83%	40.5%
Expected life (in years)	4.56	4.49
Weighted-average fair value of options granted (per share)	$4.97	$7.89

During the six months ended June 30, 2012, there were no material proceeds from option exercises. During the six months ended June 30, 2011, the aggregate intrinsic value of stock options exercised was approximately $1.1 million and the cash received from the exercise of stock options totaled $1.9 million. The Company did not realize any actual tax benefit from tax deductions for stock option exercises during the six months ended June 30, 2012 or 2011 due to the full valuation allowance on the Company's U.S. deferred tax assets.

Information with respect to non-vested restricted stock units for the six months ended June 30, 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)	329,500		$11.13
Vested	(178,977	)	$21.24
Forfeited	(16,356	)	$13.20
Non-vested at June 30, 2012 (b)	956,200		$16.35	3.17	$7,095
Expected to vest	780,121		$16.38	2.20	$5,788

(a) Restricted stock units granted during the six months ended June 30, 2012 included 143,750 units that had vesting based on performance conditions.

(b) Non-vested restricted stock units at June 30, 2012 included 574,750 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 six months ended June 30, 2011. No restricted stock units with vesting based on market conditions or a combination of performance or market conditions were granted during the six months ended June 30, 2012.

	Six Months Ended June 30, 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 six months ended June 30, 2011 was $21.71. The total fair value of restricted stock units vested during the six months ended June 30, 2012 and 2011 was $3.8 million and $4.6 million, respectively.

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 six months ended June 30, 2012 and 2011:

	Six Months Ended June 30,
	2012	2011
Expected dividend yield	0.00%	0.00%
Risk-free interest rate	0.73%	0.23%
Expected volatility	50.9%	40.9%
Expected life (in years)	0.25	0.24
Weighted-average fair value of shares issued (per share)	$1.49	$2.83

The following table sets forth the quantities and average prices of shares issued under the ESPP for the six months ended June 30, 2012 and 2011:

	Six Months Ended June 30,
	2012	2011
Shares issued under the ESPP	72,145	40,915
Average price of shares issued under ESPP	$7.77	$14.96

A total of 540,362 shares remained available for issuance under the ESPP at June 30, 2012.

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 June 30, 2012, the Company's annualized estimated forfeiture rates were 0% for non-employee director awards, 10% for executive management awards 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 and six months ended June 30, 2012 and 2011, respectively (in thousands):

	Three Months Ended June 30,					Six Months Ended June 30,
	2012			2011 (Revised)		2012		2011 (Revised)
Cost of products revenues	$	110		$	110	$	204	$	249
Cost of services revenues	151			277		308		545
Research and development expenses	268			427		574		899
Marketing and selling expenses	(62		)	1,356		1,197		2,574
General and administrative expenses	1,776			1,847		3,091		3,883
	$	2,243		$	4,017	$	5,374	$	8,150

As a result of the 2012 restructuring plan certain time based stock options and restricted stock unit awards will be accelerated resulting in $1.0 million of expense which was offset by $2.1 million of reduced expense due to the forfeiture of performance based options and restricted stock units. The net effect to operating expenses was a benefit of $1.1 million within Marketing and selling expenses in the Company's consolidated statements of operations for the three and six months ended June 30, 2012 . At June 30, 2012, there was approximately $25 million of total unrecognized compensation cost, before forfeitures, related to non-vested stock-based compensation awards granted under the Company's stock-based compensation plans.