Unaudited Quarterly Results of Operations Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended							12 Months Ended
	Oct. 28, 2016	Jul. 29, 2016	Apr. 29, 2016	Jan. 29, 2016	Oct. 30, 2015	Jul. 31, 2015	May 01, 2015	Feb. 03, 2017	Jan. 29, 2016	Jan. 30, 2015
Effect of Fourth Quarter Events [Line Items]
Research and development	$ 16,963	$ 17,373	$ 17,597	$ 18,097	$ 16,987	$ 17,584	$ 16,930	$ 71,030	$ 69,598	$ 45,092
Sales and marketing	29,725	31,820	30,262	28,957	29,635	29,210	24,176	124,950	111,978	85,046
General and administrative	21,626	21,600	21,085	19,880	20,945	20,693	18,627	86,876	80,145	48,239
Total operating expenses	68,314	70,793	68,944	66,934	67,567	67,487	59,733	$ 282,856	261,721	178,377
As stated
Effect of Fourth Quarter Events [Line Items]
Research and development	12,181	12,848	13,596	13,045	12,230	12,643	11,830		49,747	32,053
Sales and marketing	26,424	28,639	27,496	0	27,109	26,696	22,119		0	0
General and administrative	29,709	29,306	27,852	53,889	28,228	28,148	25,784		0	0
Total operating expenses	68,314	70,793	68,944	66,934	67,567	67,487	59,733		261,721	178,377
Reclassification
Effect of Fourth Quarter Events [Line Items]
Research and development	4,782	4,525	4,001	5,052	4,757	4,941	5,100		19,851	13,039
Sales and marketing	3,301	3,181	2,766	28,957	2,526	2,514	2,057		111,978	85,046
General and administrative	(8,083)	(7,706)	(6,767)	(34,009)	(7,283)	(7,455)	(7,157)		80,145	48,239
Total operating expenses	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0		$ 0	$ 0