Balance Sheet Detail - Components of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 28, 2015	Jun. 30, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 14,735	$ 14,792
Less accumulated depreciation	(13,857)	(13,710)
Net property and equipment	878	1,082
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,971	3,991
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,438	5,456
Software development costs [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,688	2,688
Demonstration equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,711	1,605
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 927	$ 1,052