Media Library, Software and Equipment - Summary of Media Library, Software and Equipment Stated at Lower of Cost or Estimated Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Media library, software and equipment, gross	$ 62,471	$ 54,457
Accumulated depreciation and amortization	(23,240)	(17,536)
Media library, software and equipment, net	39,231	36,921
Website Development Costs and Other Software [Member]
Property, Plant and Equipment [Line Items]
Media library, software and equipment, gross	15,614	13,942
Studios, Computer and Telephone Equipment [Member]
Property, Plant and Equipment [Line Items]
Media library, software and equipment, gross	1,826	2,282
Acquired Media [Member]
Property, Plant and Equipment [Line Items]
Media library, software and equipment, gross	2,280	2,675
Licensed Media [Member]
Property, Plant and Equipment [Line Items]
Media library, software and equipment, gross	4,995	4,417
Produced Media [Member]
Property, Plant and Equipment [Line Items]
Media library, software and equipment, gross	34,773	27,648
Produced Media In Progress [Member]
Property, Plant and Equipment [Line Items]
Media library, software and equipment, gross	$ 2,983	$ 3,493

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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