Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Inventory Disclosure [Line Items]
Raw materials	$ 3,539	$ 4,243
Work-in-process	721	160
Finished goods	5,623	4,860
Total	$ 9,883	$ 9,263	[1]

[1] The condensed consolidated balance sheet has been derived from the audited consolidated financial statements at December 31, 2011 but does not include all the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.