Commitments and Contingencies - Additional Information 1 (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Sep. 05, 2014	Sep. 30, 2015	Oct. 03, 2014	Sep. 30, 2015	Oct. 03, 2014
Gain Contingencies [Line Items]
Litigation settlement amount	$ 108,712
Proceeds from legal settlement		$ 6,900	$ 40,000	$ 13,700	$ 40,000
Product revenues		163,660	193,924	332,008	362,053
Interest income		600	300	1,300	300
Implied license [Member]
Gain Contingencies [Line Items]
Litigation settlement amount	$ 85,132
Satellite Services [Member] | Operating Segments [Member]
Gain Contingencies [Line Items]
Product revenues		6,376	21,289	12,652	21,319
Satellite Services [Member] | Operating Segments [Member] | Implied license [Member]
Gain Contingencies [Line Items]
Product revenues		$ 6,300	21,000	$ 12,500	21,000
Selling, General and Administrative Expenses [Member]
Gain Contingencies [Line Items]
Litigation settlement amount			$ 18,700		$ 18,700