Current Expected Credit Losses - Summary of Allowance For Credit Losses Related to Variable Consideration Receivables (Details) - Theatre Operators [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Accounts Receivable Allowance For Credit Loss [Line Items]
Beginning balance	$ 863
Current period provision	790	$ 1,653
Foreign Exchange	6	6
Ending balance	$ 1,659	$ 1,659