Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Summary of Related Activity under Incentive Plan

Related activity under the Incentive Plan is as follows:

	Awards Available			Options Outstanding			Weighted Average Exercise Price
Balance at December 31, 2010		1,858			6,802		$	6.66
Plan amendment		1,600			—			—
Restricted stock awards granted		(211	)		—			—
Restricted stock awards cancelled		8			—			—
Stock option awards granted		(1,830	)		1,830			3.97
Stock option awards exercised		—			(190	)		1.57
Stock option awards cancelled		584			(584	)		5.99
Balance at December 31, 2011		2,009			7,858			6.21
Plan amendment		1,700			—			—
Restricted stock awards granted		(415	)		—			—
Restricted stock awards cancelled		86			—			—
Stock option awards granted		(1,617	)		1,617			4.65
Stock option awards exercised		—			(350	)		1.58
Stock option awards cancelled		1,052			(1,052	)		6.26
Balance at December 31, 2012		2,815			8,073			6.09
Restricted stock awards granted		(310	)		—			—
Restricted stock awards cancelled		53			—			—
Stock option awards granted		(3,277	)		3,277			3.05
Stock option awards exercised		—			(563	)		2.37
Stock option awards cancelled		1,801			(1,801	)		7.22
Balance at December 31, 2013		1,082			8,986		$	4.99

Weighted Average Assumptions for Stock Option Awards Granted to Employees and Directors under the Incentive Plan

Weighted Average Assumptions for Stock Option Awards Granted under the Incentive Plan

	2013			2012			2011
Expected Life		4.7			5.4			5.5
Expected Volatility		84	%		87	%		80	%
Expected Dividend Yield		0.0	%		0.0	%		0.0	%
Risk-Free Interest Rate		0.7	%		0.9	%		2.2	%

Stock-Based Compensation Price Range Information

The following table summarizes, at December 31, 2013, by price range: (1) for stock option awards outstanding under the Incentive Plan, the number of stock option awards outstanding, their weighted average remaining life and their weighted average exercise price; and (2) for stock option awards exercisable under the Plan, the number of stock option awards exercisable and their weighted average exercise price:

	Outstanding						Exercisable
			Weighted		Weighted				Weighted
			Average		Average				Average
			Remaining		Exercise				Exercise
Range	Number		Life		Price		Number		Price
$0 to 3		2,526		8.1	$	1.50		806	$	1.61
3 to 6		3,784		7.6		4.54		1,534		3.95
6 to 9		1,761		4.9		7.33		1,522		7.42
9 to 12		555		3.0		11.62		555		11.62
12 to 15		356		2.4		12.53		356		12.53
15 to 18		4		2.0		15.45		4		15.45
$0 to 18		8,986		6.7	$	4.99		4,777	$	6.20

Non Vested Award [Member]

Summary of Related Activity under Incentive Plan

The following table summarizes the changes in the number and weighted-average grant-date fair value of non-vested stock option awards during 2013:

	Non-Vested Stock Option Awards			Weighted Average Grant-Date Fair Value
Balance December 31, 2012		2,435		$	3.18
Stock option awards granted		3,277			0.80
Stock option awards vested		(1,215	)		2.87
Stock option awards forfeited		(288	)		2.00
Balance December 31, 2013		4,209		$	1.50