Intangible and Other Assets, Net (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Less accumulated amortization	$ (5,007)	$ (4,982)
Intangible assets, net	968	993
Inventory, non-current	2,985
Other assets	1,861	2,131
Intangible and other assets	5,814	3,124
Capitalized patent and license costs
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 5,975	$ 5,975