Accrued and Other Current Liabilities (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Product Warranty Liability [Line Items]
Royalties and other fulfillment costs	$ 55,750,000	$ 1,989,000
Employee compensation, commissions and benefits	6,858,000	4,444,000
Sales, VAT and other taxes payable	2,547,000	785,000
Operating Lease, Liability, Current	4,805,000	0
Other	7,343,000	4,094,000
Total accrued royalties, fulfillment and other current liabilities	77,303,000	$ 11,312,000
Napster
Product Warranty Liability [Line Items]
Royalties and other fulfillment costs	54,200,000
Prepaid Royalties	$ 2,000,000.0