Summary of Revenue by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Schedule Of Revenues From External Customers [Line Items]
Revenue	$ 95,809	$ 75,748
Africa
Schedule Of Revenues From External Customers [Line Items]
Revenue	20,192	5
Asia
Schedule Of Revenues From External Customers [Line Items]
Revenue	10,171	2,143
Canada
Schedule Of Revenues From External Customers [Line Items]
Revenue	5,232	15,945
Europe
Schedule Of Revenues From External Customers [Line Items]
Revenue	25,860	4,743
United States
Schedule Of Revenues From External Customers [Line Items]
Revenue	32,397	50,522
Other
Schedule Of Revenues From External Customers [Line Items]
Revenue	$ 1,957	$ 2,390