Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

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

The following table presents the activity related to options under all plans for the years ended December 31, 2015, 2014, and 2013.



	2015				2014				2013
	Options outstanding		Weighted-average exercise price		Options outstanding		Weighted-average exercise price		Options outstanding		Weighted-average exercise price
Balance at beginning of year	85,901		$	34.85	111,571		$	38.92	139,446		$	53.66
Granted	3,300,000		4.79		—		—		5,507		6.80
Exercised/Released	—		—		—		—		(5,250	)	5.70
Cancelled / forfeited	(8,301	)	21.14		(20,482	)	33.90		(17,326	)	124.87
Expired	(1,691	)	151.20		(5,188	)	125.83		(10,806	)	90.72
Balance at end of year	3,375,909		$	5.44	85,901		$	34.85	111,571		$	38.92
Exercisable at end of year	75,909				67,407				73,665

Schedule of weighted average exercise price and weighted average remaining contractual life

Information regarding the number, weighted-average exercise price, and weighted-average remaining contractual life of options by range of exercise price at December 31, 2015 is as follows:



	Options outstanding				Exercisable options
Exercise price range	Number of options	Weighted-average exercise price		Weighted-average remaining contractual life (years)	Number of options	Weighted-average exercise price
Under $50.00	3,361,624	$	4.81	9.0	61,624	$	5.75
$80.01 - $120.00	9,201	101.30		2.2	9,201	101.30
$160.01 - $220.00	1,634	207.30		0.1	1,634	207.20
$220.01 - $279.00	3,450	271.98		1.1	3,450	271.98
	3,375,909	$	5.44	9.0	75,909	$	33.77

Schedule of nonvested restricted stock units activity

The following table presents the activity for nonvested restricted stock for the year ended December 31, 2015:



	Number of shares		Weighted- average grant date fair value per share
Nonvested as of January 1, 2015	794,473		$	6.62
Granted	411,037		5.00
Released	(222,849	)	5.19
Canceled / forfeited	(73,251	)	4.99
Nonvested as of December 31, 2015	909,410		$	6.37