Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Deferred tax assets
Stock-based compensation	$ 5,157	$ 5,012
Deferred revenue	511	1,115
Accrued expenses and compensation	868	492
Other	3,877	4,119
Research and development credit carryforwards	8,915	6,695
Net operating loss carryforwards	78,148	71,940
Total deferred tax assets	97,476	89,373
Valuation allowance	(97,476)	(89,373)	$ (87,357)	$ (78,744)
Net deferred tax assets	$ 0	$ 0

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