Commitments, Contingencies and Guarantees - Additional Information (Details) - USD ($)		3 Months Ended		12 Months Ended	25 Months Ended	51 Months Ended	95 Months Ended
	Dec. 03, 2020	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2020	Dec. 14, 2015	Mar. 27, 2008	Dec. 02, 2011
Loss Contingencies [Line Items]
Final Award in favor of company						amount of $11.3 million, consisting of past and future rents owed to the Company, plus interest and costs, as well as an additional $2,512 each day in interest from October 1, 2007 until the date the award is paid	$30,000 to cover the costs of the application
Final Award amount issued						$ 11,300,000
Final Award additional interest						$ 2,512
Final Award settlement cost							$ 30,000
Damages sought					$ 10,400,000
Damages awarded	$ 11,300,000
Litigation liability related to Final Judgment		$ 11,300,000	$ 11,300,000	$ 11,300,000
Amounts collected in respect of theater systems not delivered			7,200,000	7,200,000
Legal judgement and arbitration awards			3,200,000	4,100,000
Indemnification of its directors/officers		0	0	0
Other Indemnification		0
Minimum [Member]
Loss Contingencies [Line Items]
Counterclaim sought					$ 24,000,000.0
Maximum [Member]
Loss Contingencies [Line Items]
Product Warranty Accrual		$ 100,000	$ 100,000	$ 100,000