Fixed Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Furniture and fixtures	$ 40	$ 40
Laboratory equipment	508	508
Computer and communications equipment	261	261
Design and tooling	1,204	1,204
Property, Plant and Equipment, Gross, Total	2,013	2,013
Less accumulated depreciation and amortization	(2,013)	(2,008)
Total	$ 0	$ 5	[1]

[1] Derived from audited information