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Revenues - Schedule of Reconciliation of Contract Liabilities with Customers (Details)
$ in Thousands
6 Months Ended
Mar. 31, 2019
USD ($)
Contract liabilities with customers beginning $ 134
Consideration Received 764
Recognized in Revenue (342)
Contract liabilities with customers ending 556
Ad Revenue [Member]  
Contract liabilities with customers beginning 126
Consideration Received 374
Recognized in Revenue (311)
Contract liabilities with customers ending 189
Expo Revenue [Member]  
Contract liabilities with customers beginning
Consideration Received 357
Recognized in Revenue (2)
Contract liabilities with customers ending 355
Other [Member]  
Contract liabilities with customers beginning 8
Consideration Received 33
Recognized in Revenue (29)
Contract liabilities with customers ending $ 12