Income Taxes (Schedule of Components of Deferred Taxes) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Benefit of net operating losses	$ 8,749	$ 7,334
Tax credit carry-forwards	6,776	7,475
Deferred revenue	781	1,668
Impaired investment	691	677
Property and intangible assets	436	61
Other	1,390	1,885
Deferred tax asset	18,823	19,100
Valuation allowance	(17,976)	(17,845)
Total deferred tax assets	847	1,255
Deferred tax liabilities - basis difference and amortization	(268)	(838)
Net deferred tax liabilities	$ 579	$ 417