Summary of Related Party Transactions in Consolidated Statements of Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
ECRM
Related Party Transaction [Line Items]
Sales			$ 269		$ 216
Sumitomo
Related Party Transaction [Line Items]
Sales		[1]		[1]	1,431
Purchases		[1]		[1]	18
FTI
Related Party Transaction [Line Items]
Services		[1],[2]	2,271	[2]	7,255	[2]
Oclaro, Inc
Related Party Transaction [Line Items]
Purchases	245			[1]		[1]
Integrated Dynamics Engineering Gmbh
Related Party Transaction [Line Items]
Purchases			$ 177		$ 439

[1] Not a related party during this period.

[2] For the year ended December 31, 2011, approximately $1.3 million relates to the accounting and financial reporting services and approximately $1.0 million relates to the chief restructuring officer and related services. For the year ended December 31, 2010, approximately $3.3 million relates to the accounting and financial reporting services and approximately $3.9 million relates to the chief restructuring officer and related services.