Summary of Significant Accounting Policies (Policies)	6 Months Ended
Dec. 31, 2015
Accounting Policies [Abstract]
Fiscal Year	Fiscal Year The Company uses a fiscal calendar year ending on June 30. All references herein to "fiscal 2016" or "2016" represent the fiscal year ending June 30, 2016.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of Extreme Networks and its wholly-owned subsidiaries. All inter-company accounts and transactions have been eliminated.
Accounting Estimates	Accounting Estimates The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Estimates are used for, but are not limited to, the accounting for the allowances for doubtful accounts and sales returns, determining the fair value of acquired assets and assumed liabilities, estimated selling prices, inventory valuation and purchase commitments, depreciation and amortization, impairment of long-lived assets including goodwill, warranty accruals, restructuring liabilities, measurement of share-based compensation costs and income taxes. Actual results could differ materially from these estimates. The Company predominantly uses the United States Dollar as its functional currency. The functional currency for certain of its foreign subsidiaries is the local currency. For those subsidiaries that operate in a local currency functional environment, all assets and liabilities are translated to United States Dollars at current month end rates of exchange; and revenue and expenses are translated using the monthly average rate. Certain balances included in the condensed consolidated statements of cash flows related to restructuring liabilities for prior periods have been reclassified to conform to the current period presentation. In the condensed consolidated statement of cash flows, the changes in operating assets and liabilities for Other long-term liabilities includes the changes in restructuring liabilities and other accrued liabilities which were previously disclosed separately.
Earnings Per Share	Dilutive earnings per share is calculated by dividing net earnings by the weighted average number of common shares used in the basic earnings per share calculation plus the dilutive effect of shares subject to repurchase, options, warrants and unvested restricted stock units.
Investments	The Company considers highly liquid investments with maturities of three months or less at the date of purchase to be cash equivalents. Investments with original maturities of greater than three months, but less than one year at the balance sheet date are classified as short-term investments.
Deferred Revenue	Deferred Revenue, Net Deferred revenue, net represents amounts for (i) deferred services revenue (support arrangements, professional services and training), and (ii) deferred product revenue net of the related cost of revenue when the revenue recognition criteria have not been met. The Company offers for sale to its customers, renewable support arrangements that range from one to five years. Deferred support revenue is included within deferred revenue, net within the services category above. Deferred Distributors Revenue, Net of Cost of Sales to Distributors The Company records revenue from its distributors on a sell-through basis, recording deferred revenue and deferred cost of sales associated with all sales transactions to its distributors in “Deferred distributors revenue, net of cost of sales to distributors” in the liability section of its condensed consolidated balance sheet. The amount shown as “Deferred distributors revenue, net of cost of sales to distributors” represents the deferred gross profit on sales to distributors based on contractual pricing.
Guarantees and Product Warranties	Guarantees and Product Warranties Networking products may contain undetected hardware or software errors when new products or new versions or updates of existing products are released to the marketplace. In the past, we had experienced such errors in connection with products and product updates. The Company’s standard hardware warranty period is typically 12 months from the date of shipment to end-users and 90 days for software. For certain access products, the Company offers a limited lifetime hardware warranty commencing on the date of shipment from the Company and ending five (5) years following the Company’s announcement of the end of sale of such product. Upon shipment of products to its customers, the Company estimates expenses for the cost to repair or replace products that may be returned under warranty and accrue a liability in cost of product revenue for this amount. The determination of the Company’s warranty requirements is based on actual historical experience with the product or product family, estimates of repair and replacement costs and any product warranty problems that are identified after shipment. The Company estimates and adjusts these accruals at each balance sheet date in accordance with changes in these factors. Upon issuance of a standard product warranty, the Company discloses and recognizes a liability for the obligations it assumes under the product warranty. To facilitate sales of its products in the normal course of business, the Company indemnifies its resellers and end-user customers with respect to certain matters. The Company has agreed to hold the customer harmless against losses arising from a breach of intellectual property infringement or other claims made against certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. It is not possible to estimate the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. Historically, payments made by the Company under these agreements have not had a material impact on its operating results or financial position.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Dec. 31, 2015

The Company uses a fiscal calendar year ending on June 30. All references herein to "fiscal 2016" or "2016" represent the fiscal year ending June 30, 2016.

Principles of Consolidation

The consolidated financial statements include the accounts of Extreme Networks and its wholly-owned subsidiaries. All inter-company accounts and transactions have been eliminated.

Accounting Estimates

The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Estimates are used for, but are not limited to, the accounting for the allowances for doubtful accounts and sales returns, determining the fair value of acquired assets and assumed liabilities, estimated selling prices, inventory valuation and purchase commitments, depreciation and amortization, impairment of long-lived assets including goodwill, warranty accruals, restructuring liabilities, measurement of share-based compensation costs and income taxes. Actual results could differ materially from these estimates.

The Company predominantly uses the United States Dollar as its functional currency. The functional currency for certain of its foreign subsidiaries is the local currency. For those subsidiaries that operate in a local currency functional environment, all assets and liabilities are translated to United States Dollars at current month end rates of exchange; and revenue and expenses are translated using the monthly average rate.

Certain balances included in the condensed consolidated statements of cash flows related to restructuring liabilities for prior periods have been reclassified to conform to the current period presentation. In the condensed consolidated statement of cash flows, the changes in operating assets and liabilities for Other long-term liabilities includes the changes in restructuring liabilities and other accrued liabilities which were previously disclosed separately.

Earnings Per Share

Dilutive earnings per share is calculated by dividing net earnings by the weighted average number of common shares used in the basic earnings per share calculation plus the dilutive effect of shares subject to repurchase, options, warrants and unvested restricted stock units.

Investments

The Company considers highly liquid investments with maturities of three months or less at the date of purchase to be cash equivalents. Investments with original maturities of greater than three months, but less than one year at the balance sheet date are classified as short-term investments.

Deferred Revenue

Deferred Revenue, Net

Deferred revenue, net represents amounts for (i) deferred services revenue (support arrangements, professional services and training), and (ii) deferred product revenue net of the related cost of revenue when the revenue recognition criteria have not been met.

The Company offers for sale to its customers, renewable support arrangements that range from one to five years. Deferred support revenue is included within deferred revenue, net within the services category above.

Deferred Distributors Revenue, Net of Cost of Sales to Distributors

The Company records revenue from its distributors on a sell-through basis, recording deferred revenue and deferred cost of sales associated with all sales transactions to its distributors in “Deferred distributors revenue, net of cost of sales to distributors” in the liability section of its condensed consolidated balance sheet. The amount shown as “Deferred distributors revenue, net of cost of sales to distributors” represents the deferred gross profit on sales to distributors based on contractual pricing.

Guarantees and Product Warranties

Networking products may contain undetected hardware or software errors when new products or new versions or updates of existing products are released to the marketplace. In the past, we had experienced such errors in connection with products and product updates. The Company’s standard hardware warranty period is typically 12 months from the date of shipment to end-users and 90 days for software. For certain access products, the Company offers a limited lifetime hardware warranty commencing on the date of shipment from the Company and ending five (5) years following the Company’s announcement of the end of sale of such product. Upon shipment of products to its customers, the Company estimates expenses for the cost to repair or replace products that may be returned under warranty and accrue a liability in cost of product revenue for this amount. The determination of the Company’s warranty requirements is based on actual historical experience with the product or product family, estimates of repair and replacement costs and any product warranty problems that are identified after shipment. The Company estimates and adjusts these accruals at each balance sheet date in accordance with changes in these factors.

Upon issuance of a standard product warranty, the Company discloses and recognizes a liability for the obligations it assumes under the product warranty.

To facilitate sales of its products in the normal course of business, the Company indemnifies its resellers and end-user customers with respect to certain matters. The Company has agreed to hold the customer harmless against losses arising from a breach of intellectual property infringement or other claims made against certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. It is not possible to estimate the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. Historically, payments made by the Company under these agreements have not had a material impact on its operating results or financial position.

- Definition

Disclosure of accounting policy for investments in financial assets, including marketable securities (debt and equity securities with readily determinable fair values), investments accounted for under the equity method and cost method, securities borrowed and loaned, and repurchase and resale agreements. For marketable securities, the disclosure may include the entity's accounting treatment for transfers between investment categories and how the fair values for such securities are determined. Also, for all investments, an entity may describe its policy for assessing, recognizing and measuring impairment of the investment.

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