Selected Quarterly Consolidated Financial Data (Unaudited) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jun. 30, 2018	Jul. 01, 2017	Jul. 02, 2016	Aug. 31, 2016	Feb. 19, 2015
Debt Instrument [Line Items]
Revenues	$ 120,944	$ 127,293	$ 139,335	$ 155,598	$ 149,380	$ 162,182	$ 153,914	$ 135,492	$ 543,170	$ 600,968	$ 407,914
Cost of revenues	76,136	83,729	87,507	92,894	88,049	95,394	93,150	89,136	340,266	365,729	291,496
Gross profit	44,808	43,564	51,828	62,704	61,331	66,788	60,764	46,356	202,904	235,239	116,418
Operating expenses	35,898	35,633	32,573	31,475	31,444	29,048	27,362	28,417	135,579	116,271	100,576
Other income (expense), net	97	3,266	2,658	1,497	30	1,095	(3,098)	(14,182)	7,518	(16,155)	(6,413)
Income before income taxes	9,007	11,197	21,913	32,726	29,917	38,835	30,304	3,757	74,843	102,813	9,429
Income tax (benefit) provision	2,587	390	3,176	6,237	(26,110)	621	37	406	12,390	(25,046)	849
Net income	$ 6,420	$ 10,807	$ 18,737	$ 26,489	$ 56,027	$ 38,214	$ 30,267	$ 3,351	$ 62,453	$ 127,859	$ 8,580
Net income per share:
Basic (in usd per share)	$ 0.04	$ 0.06	$ 0.11	$ 0.16	$ 0.33	$ 0.23	$ 0.18	$ 0.03	$ 0.37	$ 0.81	$ 0.08
Diluted (in usd per share)	$ 0.04	$ 0.06	$ 0.11	$ 0.16	$ 0.33	$ 0.22	$ 0.18	$ 0.02	$ 0.36	$ 0.77	$ 0.08
Shares used in computing net income per share:
Basic (in shares)	170,325	169,602	168,990	168,137	167,349	166,808	165,822	132,480	169,263	158,115	110,599
Diluted (in shares)	172,316	171,261	170,692	170,849	170,204	169,841	168,856	135,529	171,736	165,031	113,228
Incremental shares added to denominator related to 6.00% Notes (in shares)									0	3,753	0
6.00% Convertible Senior Notes due 2020 | Convertible Notes
Shares used in computing net income per share:
Stated interest rate (percent)												6.00%	6.00%