Fair Value Measurements (Narratives) (Details) - USD ($)		1 Months Ended	3 Months Ended	12 Months Ended
	Jul. 01, 2018	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2015
Assets
Change in unrealized gains on available for sale securities					$ 497,000
Intangible asset and goodwill impairment					0	$ 0
ASU 2016-01
Assets
Change in unrealized gains on available for sale securities	$ 500,000
Level 1 Investments
Assets
Unrealized holding gain on investment					500,000
Purchases of non-marketable equity investment							$ 3,000,000.0
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
Sale of non-marketable equity investment in shares market value					$ 900,000
Loss on investments			$ 100,000
Level 1 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
Level 1 Investments | Other (Expense) Income, Net
Assets
Gain on investments					3,800,000
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			180,500,000	180,500,000	200,000,000.0
Level 3 Investments
Assets
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