Long-Lived Assets by Geographic Location (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Property and equipment, net	$ 3,923	[1]	$ 6,699	[1],[2]
Americas
Segment Reporting Information [Line Items]
Property and equipment, net	622		656
Europe
Segment Reporting Information [Line Items]
Property and equipment, net	2,695		3,970
Asia-Pacific
Segment Reporting Information [Line Items]
Property and equipment, net	$ 606		$ 2,073

[1] Amounts shown are net of impairment charges.

[2] 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.