Credit Facilities	3 Months Ended
Credit Facilities	Mar. 28, 2014
Debt Disclosure [Abstract]
Credit Facilities	CREDIT FACILITIES Harmonic has a bank line of credit facility with Silicon Valley Bank that provides for borrowings of up to $10.0 million and matures on August 22, 2014. There were no borrowings during the three months ended March 28, 2014. As of March 28, 2014, the amount available for borrowing under this facility, net of $0.2 million of standby letters of credit, was $9.8 million. This facility, which became effective in August 2011 and was amended in August 2012, contains a financial covenant that requires Harmonic to maintain a ratio of unrestricted cash, accounts receivable and short term investments to current liabilities (less deferred revenue) of at least 1.75 to 1.00. As of March 28, 2014, the Company’s ratio under that covenant was 4.33 to 1. In the event of noncompliance by Harmonic with the covenants under the facility, including the financial covenant referenced above, Silicon Valley Bank would be entitled to exercise its remedies under the facility, including declaring all obligations immediately due and payable. As of March 28, 2014, Harmonic was in compliance with the covenants under the line of credit facility. Borrowings pursuant to the line would bear interest at the bank’s prime rate (3.25% at March 28, 2014,) or at LIBOR for the desired borrowing period (an annualized rate of 0.15% for a one month borrowing period at March 28, 2014) plus 1.75%, or 1.90%. Borrowings are not collateralized.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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