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