Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2018
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	$ 16,537	$ 16,537	$ 71,729
Tax Credit Carryforward, Expiration Period			20 years
Tax Credit Carryforward, Valuation Allowance	1,131	1,131
Scenario, Forecast [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic					$ 56,035
Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Unrecognized Tax Benefits	142	142
Other Noncurrent Liabilities [Member] | Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Unrecognized Tax Benefits	12	12
Domestic Tax Authority [Member] | Research and Development Tax Credit [Member]
Operating Loss Carryforwards [Line Items]
Other Assets, Current	26	26
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount	0	274	$ 719	$ 675
State and Local Jurisdiction [Member] | Research and Development Tax Credit [Member]
Operating Loss Carryforwards [Line Items]
Other Assets, Current	$ 575	$ 575