Condensed Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Jun. 30, 2014
Current assets:
Allowance for doubtful accounts	$ 4,344	$ 3,618
Stockholders’ equity:
Convertible preferred stock, par value (in dollars per share)	$ 0.001extr_ConvertiblePreferredStockParValue	$ 0.001extr_ConvertiblePreferredStockParValue
Convertible preferred stock, shares authorized	2,000,000	2,000,000
Convertible preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	750,000,000us-gaap_CommonStockSharesAuthorized	750,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	100,050,411us-gaap_CommonStockSharesIssued	96,980,214us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	100,050,411us-gaap_CommonStockSharesOutstanding	96,980,214us-gaap_CommonStockSharesOutstanding

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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