Stock-Based Awards (Tables)

12 Months Ended

Dec. 31, 2015

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

Summary of Option Activity

A summary of option activity is as follows:

	Options			Weighted- Average Exercise Price
Outstanding January 1, 2013		12,760,191		$	0.95
Granted		—			—
Forfeitures or expirations		(40,000	)		4.11
Exercised		(4,875,500	)		0.38
Outstanding at December 31, 2013		7,844,691		$	1.29
Granted		—			—
Forfeitures or expirations		—			—
Exercised		(2,514,621	)		0.61
Outstanding at December 31, 2014		5,330,070		$	1.61
Granted		—			—
Forfeitures or expirations		—			—
Exercised		(3,785,473	)		1.19
Outstanding at December 31, 2015		1,544,597		$	2.62

Summary of Stock Options Outstanding

The following table summarizes information on stock options outstanding at December 31, 2015:

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number Outstanding at December 31, 2015		Weighted- Average Remaining Contractual Life in Years		Weighted- Average Exercise Price		Number Exercisable at December 31, 2015		Weighted- Average Exercise Price		Aggregate Intrinsic Value at December 31, 2015
$0.70 – $0.70		435,000		3.1		0.70		435,000		0.70		6,516
$1.07 – $1.07		263,635		1.3		1.07		263,635		1.07		3,852
$2.09 – $2.26		396,426		3.4		2.20		396,426		2.20		5,345
$5.05 – $5.05		285,000		5.1		5.05		210,000		5.05		2,232
$6.36 – $6.82		74,536		5.4		6.46		74,536		6.46		687
$7.01 – $8.51		90,000		5.7		7.48		90,000		7.48		738
		1,544,597		3.5	$	2.62		1,469,597	$	2.50	$	19,370

Summary of Restricted Shares Outstanding

The following table summarizes information about restricted shares outstanding for the years ended December 31, 2015, 2014 and 2013:

	Restricted Stock Awards
Unvested balance at January 1, 2013		1,281,144
Granted		981,810
Vested		(358,334	)
Forfeited		(7,743	)
Unvested balance at December 31, 2013		1,896,877
Granted		623,088
Vested		(996,385	)
Forfeited		(9,641	)
Unvested balance at December 31, 2014		1,513,939
Granted		886,413
Vested		(753,917	)
Forfeited		(25,709	)
Unvested balance at December 31, 2015		1,620,726

Summary of Stock-Based Compensation Expense

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

	Year Ended December 31,
	2015		2014		2013
Employees and directors option awards	$	295	$	487	$	381
Employees and directors restricted stock awards		10,605		7,650		6,078
Total	$	10,900	$	8,137	$	6,459

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, 2015:

	Unrecognized Stock-Based Compensation		Average Remaining Vesting Period
Employees and directors option awards	$	120		1.07
Employees and directors restricted stock awards	$	17,008		1.61