Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jun. 30, 2019
Accounts Payable and Accrued Expenses
Accounts payable, trade	$ 199	$ 221
Accrued compensation	412	56
Unrecognized income from research and development tax credits	35	35
Other accrued expenses	240	348
Total accounts payable and accrued expenses	$ 886	$ 660