Investments (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Available-for-sale Debt Securities, Amortized Cost Basis	$ 25,761	$ 15,072
Available-for-sale Equity Securities, Amortized Cost Basis	8,877	6,316
Available-for-sale Equity Securities, Gross Unrealized Gain	0	11
Available-for-sale Equity Securities, Gross Unrealized Gain	0	511
Available-for-sale Debt Securities, Gross Unrealized Loss	(5,368)	(1,702)
Available-for-sale Equity Securities, Gross Unrealized Loss	(1,472)	(198)
Available-for-sale Securities, Debt Securities	20,393	13,381
Available-for-sale Equity Securities, Gross Unrealized Loss	7,405	6,629
Common stock [Member]
Available-for-sale Equity Securities, Amortized Cost Basis	5,706	5,239
Available-for-sale Equity Securities, Gross Unrealized Gain	0	491
Available-for-sale Equity Securities, Gross Unrealized Loss	(1,185)	(193)
Available-for-sale Equity Securities, Gross Unrealized Loss	4,521	5,537
Common stock warrants [Member]
Available-for-sale Equity Securities, Amortized Cost Basis	288	288
Available-for-sale Equity Securities, Gross Unrealized Gain	0	0
Available-for-sale Equity Securities, Gross Unrealized Loss	(287)	(5)
Available-for-sale Equity Securities, Gross Unrealized Loss	1	283
Preferred Stock [Member]
Available-for-sale Equity Securities, Amortized Cost Basis	2,883
Available-for-sale Equity Securities, Gross Unrealized Gain	0
Available-for-sale Equity Securities, Gross Unrealized Loss	0
Available-for-sale Equity Securities, Gross Unrealized Loss	2,883
Commercial Paper [Member]
Available-for-sale Debt Securities, Amortized Cost Basis		3,294
Available-for-sale Equity Securities, Gross Unrealized Gain		0
Available-for-sale Debt Securities, Gross Unrealized Loss		0
Available-for-sale Securities, Debt Securities		3,294
Corporate Debt Securities [Member]
Available-for-sale Debt Securities, Amortized Cost Basis	25,761	11,778
Available-for-sale Equity Securities, Gross Unrealized Gain	0	11
Available-for-sale Debt Securities, Gross Unrealized Loss	(5,368)	(1,702)
Available-for-sale Securities, Debt Securities	20,393	10,087
Mutual Fund [Member]
Available-for-sale Equity Securities, Amortized Cost Basis	0	789
Available-for-sale Equity Securities, Gross Unrealized Gain	0	20
Available-for-sale Equity Securities, Gross Unrealized Loss	0	0
Available-for-sale Equity Securities, Gross Unrealized Loss	$ 0	$ 809

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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-Publisher FASB
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-Publisher FASB
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-Section 45
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