Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 9,368	[1]	$ 14,586	[1]
Accumulated depreciation	(5,445)	[2]	(7,887)	[2]
Property and equipment, net	3,923	[3]	6,699	[3],[4]
Land, building and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,842		2,277
Furniture, fixture and office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,507		5,755
Plant and machinery
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,300		5,255
Purchased software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 719		$ 1,299

[1] Amounts shown are net of $0.4 million for land, building and leasehold improvements, $2.6 million for furniture, fixture and office equipment, $3.6 million for plant and machinery and $0.5million for purchased software, which were impaired during the second quarter of 2012.

[2] Amounts shown in accumulated depreciation are net of reversal of amounts of accumulated depreciation totaling $3.1 million related to assets impaired. Additional information is provided below.

[3] Amounts shown are net of impairment charges.

[4] 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.