Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2018
Other Commitments [Line Items]
Actual cash expenditures	$ 990	$ 1,310
Scenario, Forecast [Member] | Minimum [Member]
Other Commitments [Line Items]
Actual cash expenditures			$ 10,000
Scenario, Forecast [Member] | Maximum [Member]
Other Commitments [Line Items]
Actual cash expenditures			$ 15,000
Network1 [Member]
Other Commitments [Line Items]
Cash held in escrow	$ 23,200			$ 24,100