Acquisitions - Schedule of Acquisition Price Allocation (Parenthetical) (Detail) - $ / shares		3 Months Ended
	Jan. 02, 2019	Mar. 31, 2019
Common Class A [Member]
Business Acquisition [Line Items]
Consideration transferred by issue of shares		63,795,000
Small Giant [Member] | Common Class A [Member]
Business Acquisition [Line Items]
Consideration transferred by issue of shares	63,794,746
Shares issued, price per share	$ 3.98
Small Giant [Member] | Developed Technology, Useful Life of 5 Years [Member]
Business Acquisition [Line Items]
Intangible assets, useful life	5 years
Small Giant [Member] | Trade Names, Useful Life of 7 Years [Member]
Business Acquisition [Line Items]
Intangible assets, useful life	7 years