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Joint Ventures - Additional Information (Detail)
shares in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Sep. 30, 2012
USD ($)
shares
Mar. 31, 2019
USD ($)
project
Mar. 31, 2018
USD ($)
Sep. 30, 2017
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2018
Oct. 31, 2016
Schedule of Equity Method Investments [Line Items]              
Net income (loss) attributable to non-controlling interests   $ 31,000 $ 51,000        
Pacific Animation Partners Joint Venture              
Schedule of Equity Method Investments [Line Items]              
Equity method investment, ownership percentage   50.00%          
Number of episodes for which production completed | project   65          
Equity in net income/(loss) of joint venture   $ 0 0        
DreamPlay Toys              
Schedule of Equity Method Investments [Line Items]              
Equity method investment, ownership percentage 50.00%            
Cash paid to Nant Works for joint venture $ 8,000,000            
DreamPlay Toys | Technology Rights              
Schedule of Equity Method Investments [Line Items]              
Impairment charge       $ 2,900,000      
DreamPlay, LLC              
Schedule of Equity Method Investments [Line Items]              
Equity method investment, ownership percentage         5.00%    
Cash paid to Nant Works for joint venture         $ 7,000,000    
Impairment charge       $ 7,000,000 $ 7,000,000    
Joint Venture With Meisheng Culture & Creative Corp.              
Schedule of Equity Method Investments [Line Items]              
Equity method investment, ownership percentage           51.00%  
Net income (loss) attributable to non-controlling interests   31,000 51,000        
Hong Kong Meisheng Cultural Co              
Schedule of Equity Method Investments [Line Items]              
Equity method investment, ownership percentage             50.00%
Net income (loss) attributable to non-controlling interests   $ 0 0        
Hong Kong Meisheng Cultural Co | Minimum              
Schedule of Equity Method Investments [Line Items]              
Ownership percentage   10.00%          
NantWorks | DreamPlay Toys              
Schedule of Equity Method Investments [Line Items]              
Issue of warrants (in shares) | shares 1.5            
Investment in DreamPlay LLC $ 7,000,000            
Affiliated Entity | Hong Kong Meisheng Cultural Co              
Schedule of Equity Method Investments [Line Items]              
Purchases from related party   $ 2,200,000 2,000,000        
Due to related parties   $ 600,000 $ 2,000,000