Balance Sheet Detail - Components of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Jun. 30, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 14,785	$ 14,792
Less accumulated depreciation	(13,799)	(13,710)
Net property and equipment	986	1,082
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,035	3,991
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,446	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	1,649	1,605
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 967	$ 1,052