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Fair Value Measurements (Schedule of Fair Value for Financial Assets and Liabilities Measured on Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands | Jun. 30, 2018 | Jun. 30, 2017
--- | --- | ---
Assets |  |
Total assets measured at fair value | $ 1,459 | $ 7,291
Marketable securities |  |
Assets |  |
Investments | 1,459 |
Money market funds |  |
Assets |  |
Investments |  | 4,291
Investment in non-marketable equity |  |
Assets |  |
Investments |  | 3,000
Level 1 |  |
Assets |  |
Total assets measured at fair value | 1,459 | 4,291
Level 1 | Marketable securities |  |
Assets |  |
Investments | 1,459 |
Level 1 | Money market funds |  |
Assets |  |
Investments |  | 4,291
Level 3 |  |
Assets |  |
Total assets measured at fair value |  | 3,000
Liabilities |  |
Acquisition-related contingent consideration obligations | 12,749 |
Total liabilities measured at fair value | $ 12,749 |
Level 3 | Investment in non-marketable equity |  |
Assets |  |
Investments |  | $ 3,000

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