Stock-Based Awards (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Options Activity

A summary of option activity is as follows:

	Options			Weighted- Average Exercise Price
Outstanding January 1, 2011		21,443,617		$	0.60
Granted		825,000			5.80
Forfeitures or expirations		(135,316	)		2.04
Exercised		(1,280,687	)		0.64
Outstanding at December 31, 2011		20,852,614		$	0.79
Granted		—			0.00
Forfeitures or expirations		(73,907	)		1.75
Exercised		(8,018,516	)		0.58
Outstanding at December 31, 2012		12,760,191		$	0.95
Granted		—			0.00
Forfeitures or expirations		(40,000	)		4.11
Exercised		(4,875,500	)		0.38
Outstanding at December 31, 2013		7,844,691		$	1.29

Summary of Stock Options Outstanding

The following table summarizes information on stock options outstanding at December 31, 2013:

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number Outstanding at December 31, 2013		Weighted- Average Remaining Contractual Life in Years		Weighted- Average Exercise Price		Number Exercisable at December 31, 2013		Weighted- Average Exercise Price		Aggregate Intrinsic Value at December 31, 2013
$0.03 – $0.16		1,701,953		0.6	$	0.10		1,701,953	$	0.10	$	29,967
$0.70 – $0.70		2,525,000		5.1		0.70		2,375,000		0.70		40,399
$1.07 – $1.28		1,935,689		2.9		1.07		1,935,689		1.07		32,208
$2.03 – $4.03		1,017,049		4.5		2.22		978,299		2.20		15,178
$5.05 – $5.05		400,000		7.1		5.05		250,000		5.05		3,165
$6.36 – $6.82		170,000		7.4		6.52		70,000		6.52		783
$7.01 – $8.51		95,000		7.7		7.50		35,000		7.54		356
		7,844,691		3.7	$	1.29		7,345,941	$	1.09	$	122,056

Summary of Weighted Average Assumption Used to Estimate Fair Value Option Pricing Model

The estimated weighted-average fair value for options granted in 2011 was $3.31.

	2011
Expected life (years)	5.0
Risk free interest rate	0.84% to 2.32%
Dividends	—
Volatility	67.00% to 70.62%

Summary of Restricted Shares Outstanding

The following table summarizes information about restricted shares outstanding for the years ended December 31, 2013, 2012 and 2011:

	Restricted Stock Awards
Unvested balance at January 1, 2011		2,158,509
Granted		561,526
Vested		(1,382,376	)
Forfeited		(26,288	)
Unvested balance at December 31, 2011		1,311,371
Granted		1,209,114
Vested		(1,209,121	)
Forfeited		(30,220	)
Unvested balance at December 31, 2012		1,281,144
Granted		981,810
Vested		(358,334	)
Forfeited		(7,743	)
Unvested balance at December 31, 2013		1,896,877

Summary of Stock-Based Compensation Expense

The following table summarizes the Company’s stock-based compensation expense:

	For the Year Ended December 31,
	2013		2012		2011
Employees and directors option awards	$	381	$	1,436	$	2,402
Employees and directors restricted stock awards		6,078		3,814		2,041
Nonemployee consultants and special advisers restricted stock awards		—		2,187		2,698
Total	$	6,459	$	7,437	$	7,141

Summary of Unrecognized Stock-Based Compensation Expense and Remaining Vesting Period

The following table summarizes the Company’s unrecognized stock-based compensation expense and remaining vesting period as of December 31, 2013:

	Unrecognized Stock-Based Compensation		Average Remaining Vesting Period
Employees and directors option awards	$	902		1.96
Employees and directors restricted stock awards	$	8,308		1.75