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Fair Value Measurements (Narratives) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Sep. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2015
Assets |  |  |  |  |
Gain on investments |  |  | $ 3,967,000 |  |
Intangible asset and goodwill impairment |  |  | 0 | $ 0 |
Level 1 Investments |  |  |  |  |
Assets |  |  |  |  |
Unrealized holding gain on investments |  |  | 500,000 |  |
Level 2 Investments |  |  |  |  |
Assets |  |  |  |  |
Transfers of assets between Level 1 and Level 2 | $ 0 |  | 0 | 0 |
Transfers of liabilities between Level 1 and Level 2 | 0 |  | 0 | 0 |
Long-term debt, fair value | $ 200,000,000 |  | $ 200,000,000 | 93,700,000 |
Level 3 Investments |  |  |  |  |
Assets |  |  |  |  |
Purchases of non-marketable equity investment |  |  |  |  | $ 3,000,000
Consideration from sale of non-marketable equity investment |  | $ 6,800,000 |  |  |
Consideration from sale of non-marketable equity investment in cash |  | 5,400,000 |  |  |
Consideration from sale of non-marketable equity investment |  | 5,800,000 |  |  |
Sale of non-marketable equity investment in cash |  | $ 4,900,000 |  |  |
Shares received for sale of non-marketable equity investment |  | 41,685 |  |  |
Shares held in escrow | 23,252 |  | 23,252 |  |
Sale of non-marketable equity investment in shares market value |  | $ 900,000 |  |  |
Remaining consideration from non-marketable securities in cash |  | 500,000 |  |  |
Remaining consideration from non-marketable securities in shares |  | $ 500,000 |  |  |
Escrow period | 1 year |  | 18 months |  |
Gain on investments | $ 200,000 |  |  |  |
Remaining shares held in marketable securities | 22,985 |  |  |  |
Transfers of assets between Level 2 and Level 3 | $ 0 |  | $ 0 | 0 |
Transfers of liabilities between Level 2 and Level 3 | $ 0 |  | 0 | 0 |
Intangible asset and goodwill impairment |  |  | 0 | $ 0 |
Level 3 Investments | Common Stock |  |  |  |  |
Assets |  |  |  |  |
Consideration in shares for sale of marketable securities |  | 65,937 |  |  |
Consideration from sale of marketable securities equity investment in shares market value |  | $ 1,400,000 |  |  |
Sale of marketable securities only equity position | 18,700 |  |  |  |
Level 3 Investments | Other Income (Expense), Net |  |  |  |  |
Assets |  |  |  |  |
Gain on investments |  |  | $ 3,800,000 |  |

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