Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Inventory Disclosure [Line Items]
Raw materials	$ 3,631	$ 4,002
Work-in-process	602	248
Finished goods	6,777	4,642
Total	$ 11,010	$ 8,892	[1]

[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.