Business Combinations - Summary of Intangible Assets Acquired (Details) - Tunable Laser Product Lines From EMCORE Corporation - USD ($) $ in Thousands	Jan. 02, 2015	Apr. 16, 2015
Business Acquisition [Line Items]
Purchased intangible assets	$ 4,800
Developed technology
Business Acquisition [Line Items]
Useful Life	7 years
Purchased intangible assets	$ 4,100	$ 4,100
Customer relationships
Business Acquisition [Line Items]
Useful Life	2 years
Purchased intangible assets	$ 700	$ 700

The amount of identifiable intangible assets recognized as of the acquisition date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
-URI http://asc.fasb.org/extlink&oid=108330185&loc=d3e2207-128464

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant