Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Fair Value of Each Stock Option Granted Weighted-Average Assumptions

The fair value of each stock option granted was estimated using the following weighted-average assumptions:

	Year Ended			Year Ended			Year Ended
	December 31,			December 31,			December 31,
	2014			2013			2012
Fair value of options granted	$	3.26		$	1.69		$	1.26
Expected volatility		117	%		91	%		89	%
Risk-free interest rate		2.0	%		1.3	%		1.5	%
Expected lives		6.1 years			7.0 years			7.0 years
Dividend rate		2.3%			—			—

Summary of Stock Option Activity

The following is a summary of stock option activity: (in thousands, except exercise price data and contractual life data):

						Weighted-
				Weighted-		Average
	Number			Average		Remaining		Aggregate
	of			Exercise		Contractual		Intrinsic
Options	Shares			Price		Life (Years)		Value
Outstanding at December 31, 2011		7,205		$	6.68
Granted		2,592		$	1.64
Exercised		(50	)		0.46			$	45
Forfeited or cancelled		(1,540	)		9.72
Outstanding at December 31, 2012		8,207		$	4.55
Granted		2,815		$	2.18
Exercised		(1,683	)		1.67			$	4,965
Forfeited or cancelled		(1,622	)		5.70
Outstanding at December 31, 2013		7,717		$	4.05			$	22,023
Granted		350		$	4.4
Exercised		(1,042	)		1.77			$	5,036
Forfeited or cancelled		(1,470	)		8.53
Outstanding at December 31, 2014		5,555		$	3.33		6.12	$	19,015
Vested and Exercisable at December 31, 2014		2,594		$	4.69		3.91	$	6,157
Vested and Expected to Vest at December 31, 2014		3,546		$	2.24		8.01	$	15,046

Summary of Nonvested Restricted Stock and Restricted Stock Units Activity

The following is a summary of nonvested restricted stock and restricted stock units activity: (in thousands, except grant date fair value data):

				Weighted-
	Number			Average
	of			Grant Date
	Shares			Fair Value
Nonvested balance at December 31, 2011		1,910		$	2.81
Vested		(840	)		3.37
Forfeited or cancelled		(55	)		1.97
Nonvested balance at December 31, 2012		1,015		$	2.43
Vested		(487	)		2.16
Forfeited or cancelled		(34	)		1.78
Nonvested balance at December 31, 2013		494		$	2.73
Granted		1,181			4.51
Vested		(489	)		3.38
Forfeited or cancelled		(17	)		2.53
Nonvested balance at December 31, 2014		1,169		$	4.15