Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2017
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic			$ 56,568
Tax Credit Carryforward, Expiration Period		20 years
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	$ 475	$ 475
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	35.00%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		$ 20
Income Tax Credits and Adjustments	8	581
Deferred Tax Assets, in Process Research and Development	$ 94	$ 94
Federal [Member] | Research and Development Tax Credit [Member]
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount				$ 719
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards			$ 35,379
State and Local Jurisdiction [Member] | Research and Development Tax Credit [Member]
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount				$ 675