Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 20,048	$ 18,938
Accumulated depreciation	(10,971)	(10,046)
Property and equipment, net	9,077	8,892	[1]
Land
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	280	282
Building and leasehold improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	2,467	1,988
Furniture, fixture and office equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	5,283	5,067
Machinery
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	9,808	9,789
Software
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 2,210	$ 1,812

[1] The condensed consolidated balance sheet has been derived from the audited consolidated financial statements at December 31, 2012 but does not include all the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.