Business Combination - Schedule of Preliminary Allocation of Purchase Price to Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed Based on Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 02, 2019	Jan. 01, 2019
Business Acquisition [Line Items]
Prepaid expenses and other current assets			$ 100
Goodwill	$ 192,739	$ 321,531	$ 321,531