Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Accounts Payable and Accrued Expenses
Accounts payable, trade	$ 294	$ 221
Lease liability - current	225	153
Dividends payable, short-term portion	53	1
Unrecognized income from research and development tax credits	35	35
Accrued compensation	29	56
Other accrued expenses	167	194
Total accounts payable and accrued expenses	$ 803	$ 660