Segment and Geographic Information - Details of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 89,253	$ 94,864
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	82,332	88,776
Canada
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	1,615	1,132
Russian Federation Subsidiary
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	1,922	1,746
United Kingdom
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 3,384	$ 3,210