Balance Sheet Detail - Schedule of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 14,792	$ 14,409
Accumulated depreciation and amortization	(13,710)	(12,884)
Property and equipment, net	1,082	1,525
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,991	3,676
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,456	5,451
Demonstration equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,605	1,537
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,052	1,057
Software Development [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,688	$ 2,688