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Business combinations (Pro Forma Information) (Details) (Enterasys Networks, Inc., USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012
Enterasys Networks, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Net revenues | $ 159,944 | $ 158,258 | $ 321,837 | $ 327,599
Net loss | $ (55,090) | $ (15,196) | $ (51,682) | $ (14,833)
Net loss per share - basic and diluted (USD per share) | $ (0.57) | $ (0.16) | $ (0.54) | $ (0.16)

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