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Revenues - Schedule of Reconciliation of Contract Liabilities with Customers (Details)
$ in Thousands
3 Months Ended
Dec. 31, 2018
USD ($)
Contract liabilities with customers beginning $ 134
Consideration Received 476
Recognized in Revenue (181)
Contract liabilities with customers ending 429
Ad Revenue [Member]  
Contract liabilities with customers beginning 126
Consideration Received 274
Recognized in Revenue (181)
Contract liabilities with customers ending 219
Expo Revenue [Member]  
Contract liabilities with customers beginning
Consideration Received 201
Recognized in Revenue
Contract liabilities with customers ending 201
Other [Member]  
Contract liabilities with customers beginning 8
Consideration Received 1
Recognized in Revenue
Contract liabilities with customers ending $ 9