Pro Forma Results of Operations (Detail) (NeoPhotonics Semiconductor, USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
NeoPhotonics Semiconductor
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Revenue	$ 76,814	$ 81,816	$ 220,558	$ 228,158
Net income (loss)	$ (8,146)	$ 3,499	$ (18,942)	$ (10,822)
Basic net income (loss) per share	$ (0.26)	$ 0.12	$ (0.61)	$ (0.39)
Diluted net income (loss) per share	$ (0.26)	$ 0.11	$ (0.61)	$ (0.39)

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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