Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic		$ 56,113
Tax Credit Carryforward, Expiration Period	20 years
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	$ 975
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	$ 35
Income Tax Credits and Adjustments	173
Additional Income Tax Credits and Adjustments	$ 376
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		33,240
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