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Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Stock-based Compensation [Abstract]

Stock Option Activity

A summary of activity for the year ended December 31, 2012 is as follows:

		Options				Weighted Average Exercise Price
Balance as of January 1, 2012			7,457,184			$	5.13
Granted			864,750			$	3.17
Exercised			(346,432	)		$	3.05
Expired			(379,957	)		$	4.17
Cancelled/forfeited			(850,559	)		$	5.34
Balance as of December 31, 2012			6,744,986			$	5.02

Stock Options Vested and Expected to Vest

		Options				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (years)				Aggregate Intrinsic Value
Balance as of December 31, 2012			6,744,986			$	5.02				5.45			$	217,028
Vested and expected to vest at December 31, 2012			6,721,818			$	5.02				5.44			$	215,799
Exercisable at December 31, 2012			5,307,773			$	5.16				4.66			$	134,764

Weighted-average Assumptions

The fair value of each option awarded during the year ended December 31, 2012, 2011 and 2010 was estimated on the date of grant using the Black-Scholes-Merton option valuation model based on the following weighted-average assumptions:

		Years ended December 31,
		2012				2011				2010
Expected term		5.20 years				5.5 years				5 years
Risk-free interest rate			0.83	%			1.95	%			2.22	%
Volatility			75.63	%			72.36	%			72.81	%
Dividends			—				—				—
Resulting weighted average grant date fair value		$	1.96			$	3.24			$	4.02

Restricted Stock Awards Activity

A summary of activity for the year ended December 31, 2012 is as follows:

		Restricted Stock Awards				Weighted Average Grant Date Fair Value
Balance as of January 1, 2012			79,741			$	5.59
Granted			280,408			$	3.06
Exercised/Released			(50,408	)		$	4.08
Cancelled/forfeited			(15,000	)		$	3.44
Balance as of December 31, 2012			294,741			$	3.55

Restricted Stock Awards Vested and Expected to Vest

		Restricted Stock Awards				Weighted Average Grant Date Fair Value				Weighted Average Remaining Contractual Term (years)
Balance as of December 31, 2012			294,741			$	3.55				8.9
Vested and expected to vest at December 31, 2012			294,741			$	3.55				8.9
Exercisable at December 31, 2012			109,241			$	3.34				8.6

Performance-based Restricted Stock Awards

The following table summarizes activity with respect to the performance based restricted stock awards during the year ended December 31, 2012:

		Restricted Stock Awards				Weighted Average Grant-Date Fair Value
Outstanding at January 1, 2012			246,225			$	5.82
Granted			276,375			$	3.44
Vested			0
Cancelled/forfeited			(261,300	)		$	5.68
Outstanding at December 31, 2012			261,300			$	3.44
Vested at December 31, 2012			0

Compensation Cost Recognized for Stock Options and Restricted Stock Awards

The following summarizes the total compensation cost recognized for the stock options and restricted stock awards in the accompanying financial statements:

		Years ended December 31,
		2012				2011				2010
Total compensation cost for share-based payment arrangements recognized in the statement of operations (net of tax of $0)		$	3,904,000			$	3,316,000			$	3,055,000

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