Overview of the Business and Basis of Presentation - Financial assets and liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Assets, Fair value		$ 3,090
Common Stock [Member]
Assets, Fair value	$ 4,489	4,522
Preferred Stock [Member]
Assets, Fair value	2,883	2,883
Available-for-sale Securities [Member]
Assets, Fair value	21,429	20,393
Cash and Cash Equivalents [Member]
Assets, Fair value	9,336	8,083
Corporate Debt Securities [Member]
Assets, Fair value	21,429	20,393
Cash [Member]
Assets, Fair value	4,473	5,223
Money Market Funds [Member]
Assets, Fair value	4,863	2,860
Equity Method Investments [Member]
Assets, Fair value	7,372	7,405
Fair Value, Inputs, Level 1 [Member]
Assets, Fair value		0
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member]
Assets, Fair value	4,489	4,522
Fair Value, Inputs, Level 1 [Member] | Preferred Stock [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Available-for-sale Securities [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member]
Assets, Fair value	9,336	8,083
Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Cash [Member]
Assets, Fair value	4,473	5,223
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Assets, Fair value	4,863	2,860
Fair Value, Inputs, Level 1 [Member] | Equity Method Investments [Member]
Assets, Fair value	4,489	4,522
Fair Value, Inputs, Level 2 [Member]
Assets, Fair value		0
Fair Value, Inputs, Level 2 [Member] | Common Stock [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 2 [Member] | Preferred Stock [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 2 [Member] | Available-for-sale Securities [Member]
Assets, Fair value	21,429	20,393
Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Assets, Fair value	21,429	20,393
Fair Value, Inputs, Level 2 [Member] | Cash [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 2 [Member] | Equity Method Investments [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 3 [Member]
Assets, Fair value		3,090
Fair Value, Inputs, Level 3 [Member] | Contingent cash payments
Liabilities, Fair value		2,890
Fair Value, Inputs, Level 3 [Member] | Contingent warrants
Liabilities, Fair value		200
Fair Value, Inputs, Level 3 [Member] | Common Stock [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Preferred Stock [Member]
Assets, Fair value	2,883	2,883
Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Cash and Cash Equivalents [Member]
Assets, Fair value	0
Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Cash [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]
Assets, Fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Commercial Paper [Member] | Cash and Cash Equivalents [Member]
Assets, Fair value		0
Fair Value, Inputs, Level 3 [Member] | Equity Method Investments [Member]
Assets, Fair value	$ 2,883	2,883
Contingent cash payments
Assets, Fair value		2,890
Contingent cash payments | Fair Value, Inputs, Level 1 [Member]
Assets, Fair value		0
Contingent cash payments | Fair Value, Inputs, Level 2 [Member]
Assets, Fair value		0
Contingent cash payments | Fair Value, Inputs, Level 3 [Member]
Assets, Fair value		2,890
Contingent warrants
Assets, Fair value		200
Contingent warrants | Fair Value, Inputs, Level 1 [Member]
Assets, Fair value		0
Contingent warrants | Fair Value, Inputs, Level 2 [Member]
Assets, Fair value		0
Contingent warrants | Fair Value, Inputs, Level 3 [Member]
Assets, Fair value		$ 200