Income Taxes - Reconciliation of the income tax expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Income Taxes
Provision (benefit) at federal statutory rate	$ 124	$ (2,120)
Change in valuation allowance	(1,709)	(7,124)
Permanent differences	3	478
Gain on sale of operations - permanent difference	0	536
Net operating loss expiration and adjustment	2,284	(145)
Change in federal tax rates	0	7,413
Change in state tax rates	(244)	(205)
Change in foreign tax rates	0	(86)
Change in uncertain tax positions	6	3
U.S. research and development credits	0	489
Foreign rate differential	(16)	29
State and foreign tax expense	77	(98)
Loss attributable to non-controlling interest	28	0
Other	(513)	(129)
Provision (benefit) for income taxes	$ 40	$ (959)