Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Income Taxes
Beginning balance of gross unrecognized tax benefits, Tax	$ 221	$ 183
Increases to unrecognized tax benefits resulting from the generation of additional R&D credits, Tax	55	38
Decrease to Unrecognized Tax Benefits Resulting From The Release of R&D Credits Due To The IRS Audit Tax Component	(151)
Ending balance of gross unrecognized tax benefits, Tax	125	221
Beginning balance of gross unrecognized tax benefits	221	183
Increases to unrecognized tax benefits resulting from the generation of additional R&D credits	55	38
Decrease to Unrecognized Tax Benefits Resulting From The Release of R&D Credits Due To The IRS Audit Total Component	(151)
Ending balance of gross unrecognized tax benefits	$ 125	$ 221