Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Summary of Stock Option Activity

The following table summarizes our stock option activity:

	2017			2016					Weighted
	Number of Shares	Weighted Average Exercise Price		Number of Shares	Weighted Average Exercise Price		Aggregate Intrinsic Value		Average Remaining Contractual Term
							(in thousands)		(in years)
Outstanding, beginning of year	861,366	$	3.99	778,590	$	5.36
Granted	2,146,190	$	3.85	379,000	$	2.30
Canceled	(74,324)	$	6.71	(296,224)	$	5.40
Exercised	—	$	—	—	$	—
Outstanding, end of year (1)	2,933,232	$	3.82	861,366	$	3.99	$	76	7.50
Exercisable at end of the year	408,042	$	5.07	482,366	$	5.33	$	—	1.44

(1) Includes 658 thousand unvested options granted to a former employee. For additional information, please see Note 22.

Summary of RSUs Activity

The following table summarizes our RSUs activity:

	2017				2016
	Number of RSUs		Weighted Average Grant Date Fair Value		Number of RSUs		Weighted Average Grant Date Fair Value
Outstanding, beginning of year	3,363,946		$	2.78	2,167,212		$	4.24
Granted:
RSUs	2,001,642		$	4.35	789,167		$	2.38
Performance-based restricted stock units (1)	—		$	—	1,552,001		$	2.35
Total Granted	2,001,642		$	4.35	2,341,168		$	2.36
Canceled (2)	(1,914,319	)	$	2.75	(598,650	)	$	4.75
Vested	(713,916	)	$	3.61	(545,784	)	$	4.59
Outstanding, end of year (3)	2,737,353		$	3.83	3,363,946		$	2.78

(1) Includes the maximum number of shares that could have vested from the performance-based restricted stock units (“PBRSUs”) granted in May 2016.

(2) Includes shares net-settled to cover statutory employee taxes related to the vesting of restricted stock awards, which increased treasury shares by 103 thousand and 76 thousand in the years ended December 31, 2017 and 2016, respectively.

(3) Includes 535 thousand RSUs granted to a former employee. For additional information, please see Note 22.

Stock Option

Summary of Employee Stock Options Outstanding

The following table summarizes information about employee stock options outstanding at December 31, 2017:

		Options Outstanding				Options Exercisable
Exercise Price	Shares		Weighted Average Remaining Contractual Term	Weighted Average Exercise Price		Shares	Weighted Average Exercise Price
			(in years)
$0 — $5.00	2,801,699		7.77	$	3.61	276,509	$	3.57
$5.01 — $10.00	105,783		1.38	$	6.76	105,783	$	6.76
$10.01 — $15.00	25,750		2.91	$	14.30	25,750	$	14.30
	2,933,232		7.50	$	3.82	408,042	$	5.07