Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Federal statutory income tax rate (percent)	21.00%
Tax at federal statutory rate (benefit)	$ 2,139	$ (25,303)	$ (5,433)
State income tax, net of federal benefit	917	202	517
Release of foreign valuation allowance			(2,794)
Release of US valuation allowance – Tax reform			(4,680)
Establishment of Irish valuation allowance			8,642
US valuation allowance change – deferred tax movement	(9,387)	2,414	(4,444)
Research and development credits	(2,423)	(4,947)	(6,598)
Tax impact of foreign earnings	11,979	6,925	9,817
Foreign withholding taxes	828	762	745
Stock based compensation	1,162	4,349	2,436
Goodwill amortization	1,467	331	834
Nondeductible officer compensation	1,496	862	713
Nondeductible meals and entertainment	71	364	517
AMT credit monetization		(22)
Gain on transfer of intellectual property ("IP")		19,819
Other		597	(293)
Provision (benefit) for income taxes	$ 8,249	$ 6,353	$ (21)