Deferred Compensation (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Purchases of available-for-sale securities	$ 0	$ 37,000	$ 2,112,000
Sale of available-for-sale securities	40,000	1,249,000
Other-than-temporary impairments	0	0
Interest and Other, Net
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Realized gain	6,000	$ 70,000
Accrued Expenses
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred compensation payable, current	185,000
Other Liabilities
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred compensation payable, current	$ 519,000
Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred compensation, percentage of base salary	100.00%