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Subsequent Events	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events [Text Block]	SUBSEQUENT EVENT Harmonic 2018 Restructuring To better align the Company's resources and strategic goals, in the first quarter of 2018, the Company committed to a new restructuring plan (the “Harmonic 2018 Restructuring Plan”). The restructuring activities under this plan primarily include workforce reductions of the company worldwide. The estimated cost for implementing this plan is approximately $1.7 million. The restructuring activities under this plan will commence in the first quarter of 2018 and are expected to continue into the second quarter of 2018.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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