Business Combination - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended	9 Months Ended	1 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 29, 2013 NeoPhotonics Semiconductor [Member]	Sep. 30, 2013 NeoPhotonics Semiconductor [Member]	Mar. 29, 2013 Notes Payable [Member] NeoPhotonics Semiconductor [Member]
Business Acquisition [Line Items]
Total consideration					$ 24,258,000
Cash consideration paid					13,128,000
Liabilities assumed				11,130,000			11,130,000
Withheld and placed into escrow					2,000,000
Acquisition-related transaction costs		126,000		5,317,000
Revenue						1,900,000
Costs related to sales	$ 61,512,000	$ 58,635,000	$ 178,763,000	$ 162,330,000		$ 1,800,000