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Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

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

Summary of Share-Based Compensation Expense

For the years ended December 31, 2015, 2014 and 2013, the following table presents total share-based compensation expense in each functional line item on the consolidated statements of operations (in thousands):

	Year Ended December 31,
	2015				2014				2013
Cost of revenues	$	233			$	5			$	84
Research and development	1,003				654				1,114
Sales and marketing	579				247				669
General and administrative	2,963				1,384				1,576
Restructuring charges	1,572				1,298				—
Totals	$	6,350			$	3,588			$	3,443

Share-based Compensation Stock Option Fair Value Assumptions

The following table presents the weighted-average assumptions used in the Hull-White I valuation model and the Black-Scholes valuation model by the Company in calculating the fair value of each Replacement Option and executive bonus stock option, respectively, granted under the 2015 Plan:

	Hull-White I
	Executive			Non-executive			Black-Scholes
Expected dividend yield	—	%		—	%		—	%
Risk-free interest rate	2.1	%		2.1	%		1.4	%
Volatility	64	%		64	%		67	%
Expected term (in years)	n/a			n/a			5.0
Suboptimal exercise factor	2.570			1.626			n/a
Post-vesting termination rate	3	%		3	%		n/a

The following table presents the weighted-average assumptions used in the Black-Scholes valuation model by the Company in calculating the fair value of each stock option granted under the 2009 Plan:

	Year Ended December 31,
	2015			2014			2013
Expected dividend yield	—	%		—	%		—	%
Risk-free interest rate	1.4	%		1.4	%		0.8	%
Volatility	69	%		80	%		63	%
Expected term (in years)	4.5			4.6			6.0

Summary of Stock Option Activity

stock option activity under all plans for the years ended December 31, 2015 and 2014 (dollars and shares in thousands, except per share data):

	Stock Options Outstanding			Weighted-Average Exercise Price Per Option				Weighted-Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Outstanding — December 31, 2013	3,933			$	9.45
Granted	1,658			2.92
Exercised	(89	)		2.17
Canceled	(2,437	)		10.52
Outstanding — December 31, 2014	3,065			5.27
Granted	6,657			3.02
Exercised	(273	)		2.26
Canceled	(3,364	)		5.14
Outstanding — December 31, 2015	6,085			$	3.01			8.63		$	1,012
Vested and Expected to Vest — December 31, 2015	5,836			$	3.05			8.59		$	965
Exercisable — December 31, 2015	1,157			$	6.04			4.51		$	92

Summary of Restricted Stock Unit Activity

A summary of restricted stock unit activity under all plans for the year ended December 31, 2015 is presented below (in thousands):

Non-vested at December 31, 2014	1,629
Granted	1,043
Vested	(927	)
Forfeited	(785	)
Non-vested at December 31, 2015	960

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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 number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired 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 employee stock purchase plans, including, but not limited to: (a) expected term, (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
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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