Stock Option and Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2017

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

Summary of the stock option activity including weighted average exercise prices, options outstanding and exercisable

A summary of the stock option activity, weighted average exercise prices, options outstanding and exercisable as of June 30, 2017 is as follows:

	Common Stock Options		Weighted Average Exercise Price
Outstanding, December 31, 2016	3,359		$	39.92
Granted	1,231		$	4.33
Exercised	(20	)	$	1.64
Expired or forfeited	(765	)	$	41.96
Outstanding, June 30, 2017	3,805		$	28.18
Options exercisable at June 30, 2017			1,831
Weighted average grant date fair value (per share) of options granted during the period			$	3.00

Summary of the stock options outstanding and exercisable by range of exercise prices

A summary of the stock options outstanding and exercisable as of June 30, 2017 is as follows:

			As of June 30, 2017
			Options Outstanding			Options Exercisable
Range of Exercise Prices	Total Options Outstanding		Weighted Average Remaining Life (Years)	Weighted Average Exercise Price		Number Exercisable		Weighted Average Exercise Price
$0.12-$10.03	1,346		9.0	$	4.72	181		$	7.25
$10.04-$20.00	255		6.0	$	13.46	196		$	13.51
$20.01-$30.00	127		6.4	$	25.13	112		$	25.12
$30.01-$40.00	910		6.1	$	32.70	779		$	32.84
$40.01-$55.00	754		8.0	$	46.43	390		$	45.83
$55.01-$73.22	413		8.5	$	71.41	173		$	70.78
	3,805		7.8	$	28.18	1,831		$	34.12
Aggregate Intrinsic Value	$	83				$	78

Schedule of cash proceeds from, and the aggregate intrinsic value of, stock options exercised

Cash proceeds from, and the aggregate intrinsic value of, stock options exercised during the three and six months ended June 30, 2017 and 2016, respectively, were as follows:

	Three months ended June 30,				Six months ended June 30,
	2017		2016		2017		2016
Cash proceeds from options exercised	$	15	$	3,039	$	46	$	3,808
Aggregate intrinsic value of options exercised	$	6	$	5,206	$	43	$	7,421

Summary of outstanding RSU awards

The following table presents a summary of the Company’s outstanding RSU awards granted as of June 30, 2017:

	Restricted Stock Units		Weighted Average Grant-Date Fair Value
Outstanding, December 31, 2016	721		$	55.33
Awarded	248		$	4.42
Vested	(174	)	$	31.75
Forfeited	(260	)	$	50.32
Outstanding, June 30, 2017	535		$	38.03