Revenues - Schedule of Reconciliation of Contract Liabilities with Customers (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2022 USD ($)
Contract With Customer Liability [Roll Forward]
Contract liabilities with customers, beginning	$ 354
Consideration Received	852
Recognized in Revenue	(485)
Contract liabilities with customers, ending	721
Ad revenue
Contract With Customer Liability [Roll Forward]
Contract liabilities with customers, beginning	84
Consideration Received	530
Recognized in Revenue	(480)
Contract liabilities with customers, ending	134
Expo revenue
Contract With Customer Liability [Roll Forward]
Contract liabilities with customers, beginning	151
Consideration Received	306
Recognized in Revenue	0
Contract liabilities with customers, ending	457
Other
Contract With Customer Liability [Roll Forward]
Contract liabilities with customers, beginning	119
Consideration Received	16
Recognized in Revenue	(5)
Contract liabilities with customers, ending	$ 130