v3.6.0.2

STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2016

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

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 December 31, 2016:

	Shares Available for Grant
Balance, December 31, 2015	5,017,525
Authorized	2,450,865
Options granted	(936,000	)
Options canceled	814,728
Awards granted	(3,286,825	)
Awards canceled	1,056,460
Balance, December 31, 2016	5,116,753

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, 2015	6,543,162			$	6.05			7.03		$	6,570
Options granted	936,000			6.13
Options exercised	(444,660	)		2.01
Options canceled	(814,728	)		7.57
Balance, December 31, 2016	6,219,774			$	6.15			6.42		$	6,056
Options exercisable, December 31, 2016	4,086,597			$	5.67			5.62		$	5,903
Options vested and expected to vest, December 31, 2016	5,964,671			$	6.12			6.35		$	6,046

Stock options outstanding and exercisable under stock option plans

The stock options outstanding and exercisable under its stock option plan as of December 31, 2016, are as follows:

		Options Outstanding									Options Vested and Exercisable
Range of Exercise Prices		Number of Options Outstanding			Weighted Average Remaining Contractual Term (Years)		Weighted Average Exercise Price per Share				Number of Options Exercisable			Weighted Average Exercise Price per Share
$0.25 - $2.05		1,183,702			3.86		$	1.30			1,160,368			$	1.28
$2.28 - $6.00		1,358,528			6.37		5.27				1,104,796			5.22
$6.09 - $6.85		1,041,000			8.62		6.26				215,308			6.28
$7.15 - $7.48		1,039,063			7.40		7.17				417,772			7.17
$7.98 - $9.56		73,826			5.73		8.38				58,638			8.31
$9.58 - $11.31		1,523,655			6.34		9.81				1,129,715			9.82
		6,219,774			6.42		$	6.15			4,086,597			$	5.67

Summary of RSU activity and related information

The following is a summary of the Company’s RSU activity and related information for the year ended December 31, 2016:

	Restricted Stock Units Outstanding
	Shares			Weighted Average Grant Date Fair Value Per Share
Balance, December 31, 2015	4,046,106			$	6.49
Awards granted	3,286,825			6.20
Awards vested	(2,099,785	)		$	6.54
Awards canceled	(867,476	)		$	6.57
Balance, December 31, 2016	4,365,670			$	6.23

Summary of the assumptions related to stock options

Weighted average assumptions used to value the Company's stock options granted were as follows:

	Year Ended December 31,
	2016			2015			2014
Stock options:
Expected term (in years)	5.78			6.04			5.56
Expected volatility	55	%		51	%		49	%
Risk free interest rate	1.49	%		1.75	%		1.85	%
Dividend rate	—			—			—

Summary of the assumptions related to MBRSU's

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

	Year Ended December 31,
	2016			2015		2014
MBRSUs:
Expected volatility	53	%		N/A		N/A
Risk free interest rate	1.07	%		N/A		N/A
N/A - Not applicable. No MBRSUs granted in those years.

Weighted average assumptions used to value employee stock purchase rights

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

	Year Ended December 31,
	2016		2015		2014
ESPP purchase rights:
Expected term (in years)	0.5 - 1.00		0.5 - 2.00		0.68 - 2.00
Expected volatility	34% - 44%		35% - 55%		35% - 40%
Risk free interest rate	0.49% - 0.82%		0.07% - 0.51%		0.08% - 0.49%

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:

	Year Ended December 31,
	2016				2015				2014
	(in thousands)
Cost of revenue	$	1,305			$	902			$	411
Research and development	5,393				4,651				2,419
Sales and marketing	8,269				7,112				4,121
General and administrative	6,735				5,706				3,301
Total stock-based compensation	$	21,702			$	18,371			$	10,252

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

	Year Ended December 31,
	2016				2015				2014
	(in thousands)
Stock Options	$	4,933			$	4,733			$	5,780
Restricted Stock Units	14,316				11,652				3,188
Employee Stock Purchase Plan	2,453				1,986				1,284
Total stock-based compensation	$	21,702			$	18,371			$	10,252

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Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

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