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Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Option Activity

A summary of activity for the year ended December 31, 2016 is as follows:

		Options				Weighted Average Exercise Price
Balance as of January 1, 2016			573,727			$	44.85
Granted			347,407			$	2.73
Expired			(23,979	)		$	104.11
Cancelled/forfeited			(261,043	)		$	32.07
Balance as of December 31, 2016			636,112			$	24.39

Stock Options Vested and Expected to Vest

		Options				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (years)				Aggregate Intrinsic Value
Balance as of December 31, 2016			636,112			$	24.39				7.38			$	—
Vested and expected to vest at December 31, 2016			598,135			$	25.72				7.27			$	—
Exercisable at December 31, 2016			286,358			$	47.76				5.54			$	—

Weighted-average Assumptions

The fair value of each option awarded during the year ended December 31, 2016 and 2015 was estimated on the date of grant using the Black-Scholes-Merton option valuation model based on the following weighted-average assumptions:

		Years ended December 31,
		2016				2015
Expected term		6.0 years				6.0 years
Risk-free interest rate			1.75	%			1.58	%
Volatility			77.56	%			75.07	%
Dividends			—				—
Resulting weighted average grant date fair value		$	1.84			$	4.50

Restricted Stock Awards Activity

A summary of activity for the year ended December 31, 2016 is as follows:

		Restricted Stock Awards				Weighted Average Grant Date Fair Value
Balance as of January 1, 2016			31,196			$	12.15
Vested/Released			(11,568	)		$	15.18
Cancelled/forfeited			(19,113	)		$	10.03
Balance as of December 31, 2016			515			$	64.52

Compensation Cost Recognized for Stock Options and Restricted Stock Awards

The following summarizes the total compensation cost recognized for the stock options and restricted stock awards in the accompanying financial statements (in thousands):

		Years ended December 31,
		2016				2015
Total compensation cost for share-based payment    arrangements recognized in the statement of operations    (net of tax of $0)		$	1,080			$	2,041

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Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
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Tabular disclosure of the number of fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both options (or share units) currently outstanding and options (or share units) exercisable (or convertible).

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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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