Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property Plant And Equipment [Abstract]
Building and leasehold improvements	$ 1,283	$ 1,236
Furniture, fixtures and office equipment	4,441	4,236
Plant and machinery	6,800	6,843
Purchased software	2,541	2,094
Total	15,065	14,409
Accumulated depreciation	(9,434)	(8,521)
Property and equipment, net	$ 5,631	$ 5,888