v3.7.0.1

STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2017

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of total shares available for grant

The following table summarizes the total number of shares available for grant under the 2014 Plan as of June 30, 2017:

	Shares Available for Grant
Balance, December 31, 2016	5,116,753
Authorized	2,612,263
Options granted	—
Options canceled	905,082
Awards granted	(3,191,974	)
Awards canceled	1,203,643
Balance, June 30, 2017	6,645,767

Summary of shares available for grant and outstanding stock option activity

The following table summarizes the information about outstanding stock option activity:

	Options Outstanding
	Number of Shares Underlying Outstanding Options			Weighted Average Exercise  Price				Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
										(in thousands)
Balance, December 31, 2016	6,219,774			$	6.15			6.42		$	6,056
Options granted	—			—
Options exercised	(396,865	)		1.75
Options canceled	(905,082	)		7.16
Balance, June 30, 2017	4,917,827			$	6.31			5.85		$	3,694
Options exercisable, June 30, 2017	3,743,487			$	6.11			5.15		$	3,689

Summary of RSU activity and related information

summary of the Company’s RSU activity and related information for the three months ended June 30, 2017:

	Restricted Stock Units Outstanding
	Shares			Weighted Average Grant Date Fair Value Per Share
Balance, December 31, 2016	4,365,670			$	6.23
Awards granted	3,191,974			4.97
Awards vested	(970,734	)		5.09
Awards canceled	(1,108,066	)		6.20
Balance, June 30, 2017	5,478,844			$	5.55

Summary of the assumptions related to stock options

Weighted-average assumptions for the Company's stock options granted were as follows:

	Three Months Ended June 30,					Six Months Ended June 30,
	2017		2016			2017		2016
Stock options:
Expected term (in years)	N/A		5.77			N/A		5.78
Expected volatility	N/A		55.11	%		N/A		55.16	%
Risk free interest rate	N/A		1.50	%		N/A		1.50	%

Schedule of share based payment award, equity other than options, valuation [Table Text Block]

Weighted-average assumptions to value MBRSUs under the Monte Carlo model were as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2017			2016			2017			2016
MBRSUs:
Expected volatility	46	%		53	%		46	%		53	%
Risk free interest rate	1.45	%		1.07	%		1.45	%		1.07	%

Weighted average assumptions used to value employee stock purchase rights

Weighted-average assumptions to value employee stock purchase rights under the Black-Scholes model were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
ESPP purchase rights:
Expected term (in years)	0.50 - 1.00		0.50 - 2.00		0.50 - 1.00		0.50 - 2.00
Expected volatility	34% - 39%		35% - 55%		34% - 39%		35% - 55%
Risk free interest rate	0.60% - 1.07%		0.07% - 0.51%		0.60% - 1.07%		0.07% - 0.51%

Schedule of stock-based awards granted in the consolidated statements of operations

The total stock-based compensation the Company recognized for stock-based awards in the consolidated statements of operations is as follows:

	Three Months Ended June 30,								Six Months Ended June 30,
	2017				2016				2017				2016
	(in thousands)
Cost of revenue	$	276			$	321			$	547			$	593
Research and development	1,065				1,366				1,753				2,711
Sales and marketing	1,501				2,063				2,795				3,831
General and administrative	1,602				1,704				2,902				3,215
Total stock-based compensation	$	4,444			$	5,454			$	7,997			$	10,350

The following table presents stock-based compensation expense by award-type:

	Three Months Ended June 30,								Six Months Ended June 30,
	2017				2016				2017				2016
	(in thousands)
Stock Options	$	820			$	1,185			$	1,703			$	2,331
Restricted Stock Units	3,193				3,544				5,463				6,691
Employee Stock Purchase Plan	431				725				831				1,328
Total stock-based compensation	$	4,444			$	5,454			$	7,997			$	10,350

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