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Net Loss Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Earnings Per Share [Abstract]        
Net loss $ (13,105)us-gaap_NetIncomeLoss $ (15,986)us-gaap_NetIncomeLoss $ (32,435)us-gaap_NetIncomeLoss $ (16,022)us-gaap_NetIncomeLoss
Weighted-average shares used in per share calculation - basic and diluted (in shares) 98,677us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 95,216us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 97,996us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 94,639us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Net (loss) income per share - basic and diluted (in dollars per share) $ (0.13)us-gaap_EarningsPerShareBasicAndDiluted $ (0.17)us-gaap_EarningsPerShareBasicAndDiluted $ (0.33)us-gaap_EarningsPerShareBasicAndDiluted $ (0.17)us-gaap_EarningsPerShareBasicAndDiluted