Joint Ventures - Additional Information (Detail) shares in Millions	1 Months Ended	3 Months Ended			9 Months Ended
	Sep. 30, 2012 USD ($) shares	Mar. 31, 2018 USD ($) Project	Sep. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Apr. 27, 2017	Oct. 31, 2016	Dec. 31, 2012 USD ($)
Schedule of Equity Method Investments [Line Items]
Equity in net income/(loss) of joint venture		$ 22,000		$ 0
Net income (loss) attributable to non-controlling interests		$ 51,000		31,000
Pacific Animation Partners Joint Venture
Schedule of Equity Method Investments [Line Items]
Percentage of ownership interest in joint venture		50.00%
Number of episodes for which production completed | Project		65
Episode show airing beginning date		2012-02
DreamPlay Toys
Schedule of Equity Method Investments [Line Items]
Percentage of ownership interest in joint venture	50.00%
Cash paid to Nant Works for joint venture	$ 8,000,000
Impairment charge					$ 7,000,000
Issue of warrants (in shares) | shares	1.5
Issue of warrants	$ 7,000,000
Investment in DreamPlay LLC								$ 7,000,000
Percentage of ownership interest in joint venture								5.00%
DreamPlay Toys | Technology Rights
Schedule of Equity Method Investments [Line Items]
Impairment charge			$ 2,900,000
China Joint Venture
Schedule of Equity Method Investments [Line Items]
Percentage of ownership interest in joint venture		51.00%
Net income (loss) attributable to non-controlling interests		$ 51,000,000		31,000,000
Hong Kong Meisheng Cultural Co
Schedule of Equity Method Investments [Line Items]
Percentage of ownership interest in joint venture							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%