Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 22, 2017	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Federal statutory income tax rate (percent)	35.00%	21.00%
Tax at federal statutory rate (benefit)		$ (25,303)	$ (5,433)	$ (13,061)
State income tax, net of federal benefit		202	517	521
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		2,414	(4,444)	25,302
Research and development credits		(4,947)	(6,598)	(7,311)
Tax impact of foreign earnings		7,687	10,562	(1,065)
Stock based compensation		4,349	2,436	(5,901)
Goodwill amortization		331	834	2,004
Nondeductible officer compensation		862	713	1,927
Nondeductible meals and entertainment		364	517	510
AMT credit monetization		(22)		(155)
Deferred tax liability release - Tax reform				(2,482)
Gain on transfer of intellectual property ("IP")		19,819
Other		597	(293)	(144)
Provision (benefit) for income taxes		$ 6,353	$ (21)	$ 145