Components of Property, Plant, and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	$ 8,713	$ 8,598
Accumulated depreciation and amortization	(7,430)	(6,971)
Property, plant, and equipment net, excluding land	1,283	1,627
Land	184	199
Property, plant, and equipment, net	1,467	1,826
Building
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	236	256
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	1,216	1,207
Equipment and Computers
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	6,206	6,078
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	1,055	1,049
Construction in Progress
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 0	$ 8