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Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Revenue		$ 205,399	$ 168,610	$ 557,014	$ 448,110
Cost of revenue (1)	[1]	103,016	87,550	277,397	235,437
Gross margin		102,383	81,060	279,617	212,673
Operating expenses:
Research and development (1)	[1]	28,843	19,672	80,518	57,944
Selling and marketing (1)	[1]	28,646	17,925	91,344	66,972
General and administrative (1)	[1]	21,002	16,012	58,137	48,919
Total operating expenses		78,491	53,609	229,999	173,835
Operating income		23,892	27,451	49,618	38,838
Other income, net		2,601	523	4,290	2,142
Income before income taxes		26,493	27,974	53,908	40,980
Income tax expense		4,411	8,462	7,565	12,722
Net income		$ 22,082	$ 19,512	$ 46,343	$ 28,258
Net income per share:
Basic		$ 0.80	$ 0.72	$ 1.68	$ 1.01
Diluted		$ 0.76	$ 0.70	$ 1.61	$ 0.99
Number of weighted average common shares used in calculations per share
Basic		27,739	27,237	27,520	27,878
Diluted		28,916	27,778	28,719	28,423
Stock-based compensation				$ 14,069	$ 11,781
Cost of revenue
Number of weighted average common shares used in calculations per share
Stock-based compensation		$ 274	$ 184	751	555
Research and development
Number of weighted average common shares used in calculations per share
Stock-based compensation		1,261	1,028	3,508	2,598
Selling and marketing
Number of weighted average common shares used in calculations per share
Stock-based compensation		728	444	1,869	1,316
General and administrative
Number of weighted average common shares used in calculations per share
Stock-based compensation		$ 2,771	$ 2,247	$ 7,941	$ 7,312
[1] Total stock-based compensation recorded in the three and nine months ended September 30, 2017 and October 1, 2016 included in the above figures breaks down by expense classification as follows: Three Months Ended Nine Months Ended September 30, 2017 October 1, 2016 September 30, 2017 October 1, 2016Cost of revenue$274 $184 $751 $555Research and development1,261 1,028 3,508 2,598Selling and marketing728 444 1,869 1,316General and administrative2,771 2,247 7,941 7,312

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