Summary of Significant Accounting Policies - Property, Equipment and Long-Lived Assets (Details) - USD ($)	12 Months Ended
	Mar. 26, 2017	Mar. 27, 2016	Mar. 29, 2015
Impairment of Long-Lived Assets
Impairment charges	$ 0	$ 0	$ 0
Configuration, Fulfillment and Delivery technology system
Property and Equipment
Useful Lives	7 years
Minimum | Information technology equipment and software
Property and Equipment
Useful Lives	1 year
Minimum | Furniture, telephone system, equipment and tooling
Property and Equipment
Useful Lives	3 years
Minimum | Building, building improvements and leasehold improvements
Property and Equipment
Useful Lives	2 years
Maximum | Information technology equipment and software
Property and Equipment
Useful Lives	5 years
Maximum | Furniture, telephone system, equipment and tooling
Property and Equipment
Useful Lives	10 years
Maximum | Building, building improvements and leasehold improvements
Property and Equipment
Useful Lives	40 years