Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Accounts payable, trade	$ 249	$ 582
Accrued payroll, vacation and other employee expenses	73	31
Unrecognized income from research and development tax credits	34	130
Accrued income taxes	0	87
Dividends payable	1	1
Other accrued expenses	207	458
Accounts payable and accrued expenses, Total	$ 564	$ 1,289