Income Taxes (Narratives) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2018
Operating Loss Carryforwards [Line Items]
Income tax provision (benefit)	$ 1,797,000	$ (5,270,000)	$ 3,392,000	$ (3,868,000)
Remaining state net operating loss	0	$ 0	0	$ 0
Unrecognized tax benefits	25,800,000		25,800,000
Unrecognized tax benefit future impact if recognized	$ 25,800,000		$ 25,800,000
ASU 2016-16 | Ireland | Subsidiary
Operating Loss Carryforwards [Line Items]
Deferred tax asset relating to a transfer of certain assets to subsidiary					$ 3,700,000