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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Stockholders' Equity [Line Items]

Summary Of Stock Option Activity



			Stock Options Outstanding
	Shares available		Number					Weighted average
	for grant		of shares		Exercise price			exercise price
Balances, December 31, 2015	5,814		19,468		$	0.70 – 16.00		$	5.69
Additional shares reserved	4,799
Options granted	(4,228)		4,228		$	3.89 – 12.85		$	8.68
Options exercised	—		(745)		$	0.70 – 8.90		$	3.37
Options canceled	450		(450)		$	1.16 – 16.00		$	7.29
Balances, December 31, 2016	6,835		22,501		$	1.16 – 16.00		$	6.30



Reconciliation Of Outstanding And Exercisable Stock Options



			Options Outstanding							Options Exercisable
					Weighted average
			Number		remaining contractual		Weighted average			Number		Weighted average
Exercise price			outstanding		life (Years)		exercise price			vested		exercise price
$	0.00 – 1.60		711,212		5.85		$	1.18		573,528		$	1.18
$	1.60 – 3.20		3,551,871		5.15		$	2.43		3,140,084		$	2.46
$	3.20 – 4.80		3,939,254		5.65		$	4.12		3,553,978		$	4.10
$	4.80 – 6.40		3,326,312		7.12		$	5.66		2,011,713		$	5.67
$	6.40 – 8.00		3,818,451		7.35		$	7.14		2,012,847		$	7.03
$	8.00 – 9.60		4,438,277		7.74		$	8.78		1,727,277		$	8.66
$	9.60 – 11.20		1,590,991		8.12		$	10.18		585,398		$	10.37
$	11.20 – 12.80		607,902		4.06		$	12.11		607,902		$	12.11
$	12.80 – 14.40		385,500		4.03		$	13.87		383,600		$	13.87
$	14.40 – 16.00		131,500		3.86		$	15.99		131,500		$	15.99
			22,501,270		6.59		$	6.30		14,727,827		$	5.73



Schedule Of Stock-Based Compensation Expense



	Years Ended December 31,
	2016			2015			2014
Cost of revenue	$	2,133		$	1,313		$	758
Research and development		8,257			5,196			3,785
Sales, general and administrative		9,172			7,331			5,400
Total stock-based compensation expense	$	19,562		$	13,840		$	9,943



Stock Options [Member]

Stockholders' Equity [Line Items]

Schedule Of Fair Value Of Employee Stock Options



		Years Ended December 31,
		2016			2015			2014
Expected term (years)			6.1 years			6.1 years			6.1 years
Expected volatility			70.0%			70.0%			70.0%
Risk-free interest rate			1.5%			1.7%			1.9%
Dividend yield			—			—			—




ESPP [Member]

Stockholders' Equity [Line Items]

Schedule Of Fair Value Of Employee Stock Options



		Years Ended December 31,
		2016			2015			2014
Expected term (years)			0.5 - 2.0			0.5 - 2.0			0.5 - 2.0
Expected volatility			70.0%			70.0%			70.0%
Risk-free interest rate			0.5%-0.9%			0.1%-0.7%			0.1%-0.5%
Dividend yield			—			—			—



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