Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Income Taxes
Beginning balance of gross unrecognized tax benefits, Tax	$ 125	$ 221
Increases to unrecognized tax benefits resulting from the generation of additional R&D credits, Tax	59	55
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	866	125
Beginning balance of gross unrecognized tax benefits, Interest	0	0
Increases to unrecognized tax benefits resulting from the generation of additional R&D credits, Interest	0	0
Decrease to Unrecognized Tax Benefits Resulting From The Release of R&D Credits Due To The IRS Audit Interest Component		0
Ending balance of gross unrecognized tax benefits, Interest	83	0
Beginning balance of gross unrecognized tax benefits	125	221
Increases to unrecognized tax benefits resulting from the generation of additional R&D credits	59	55
Decrease to Unrecognized Tax Benefits Resulting From The Release of R&D Credits Due To The IRS Audit Total Component		(151)
Increases to unrecognized tax benefits resulting from the generation of additional R&D credits Tax component	682
Increase to unrecognized tax benefits resulting from deemed dividends for investments in US property Interest	83
Increase to unrecognized tax benefits resulting from deemed dividends for investments in US property Total	765
Ending balance of gross unrecognized tax benefits	$ 949	$ 125