v2.3.0.15

Legal Proceedings (Details)	Oct. 31, 2011 Patent	Apr. 30, 2011 USD ($)	Dec. 31, 2010 USD ($)	Apr. 19, 2010 Patent	Mar. 31, 2010 USD ($)	Mar. 31, 2010 ILS
Legal Proceedings (Textual) [Abstract]
Infringements of number of patents held by Avid	2			4
Amount of ex-parte judgment					$ 1,700,000	6,300,000
Liabilities subject to compromise accounts payable and accrued liabilities			1,300,000
Business Acquisition Pre-acquisition Contingency Amount of Settlement		$ 1,300,000

X

- Definition

Amount of ex-parte judgment.

+ Details

Name:	hlit_AmountOfExParteJudgment
Namespace Prefix:	hlit
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Legal Proceedings.

+ Details

Name:	hlit_LegalProceedingsTextualAbstract
Namespace Prefix:	hlit
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of Patent Infringements.

+ Details

Name:	hlit_NumberOfPatentInfringements
Namespace Prefix:	hlit
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount paid or received to resolve the preacquisition contingency.

+ References

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 2

-Section A

-Subsection 7



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 40, 41, 51

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

+ Details

Name:	us-gaap_BusinessAcquisitionPreacquisitionContingencyAmountOfSettlement
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of trade accounts payable included in liabilities subject to compromise.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 852

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6918054&loc=d3e56015-112765



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 90-7

-Paragraph 26

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 852

-SubTopic 10

-Section 55

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6585303&loc=d3e56145-112766



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 852

-SubTopic 10

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6916575&loc=d3e55717-112764

+ Details

Name:	us-gaap_LiabilitiesSubjectToCompromiseAccountsPayableAndAccruedLiabilities
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant