Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Vlaue (Details) - Measured on a Recurring Basis - USD ($) $ in Thousands	Dec. 31, 2017	Apr. 02, 2017
Quoted Prices in Active Markets for Identical Assets (Level 1)
Cash Equivalents and Short-Term Investments:
US government treasuries and agencies securities	$ 71,318	$ 61,556
Money market funds	60,818	140,425
Asset-backed securities	0	0
Corporate bonds	0	0
International government bonds	0	0
Corporate commercial paper	0	0
Bank deposits	0	0
Repurchase agreement	0	0
Total assets measured at fair value	132,136	201,981
Significant Other Observable Inputs (Level 2)
Cash Equivalents and Short-Term Investments:
US government treasuries and agencies securities	0	0
Money market funds	0	0
Asset-backed securities	15,395	13,847
Corporate bonds	139,070	96,376
International government bonds	6,510	5,410
Corporate commercial paper	10,139	4,898
Bank deposits	34,133	12,305
Repurchase agreement	97	173
Total assets measured at fair value	205,344	133,009
Total
Cash Equivalents and Short-Term Investments:
US government treasuries and agencies securities	71,318	61,556
Money market funds	60,818	140,425
Asset-backed securities	15,395	13,847
Corporate bonds	139,070	96,376
International government bonds	6,510	5,410
Corporate commercial paper	10,139	4,898
Bank deposits	34,133	12,305
Repurchase agreement	97	173
Total assets measured at fair value	$ 337,480	$ 334,990