Pre-Tax Book Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Pre-tax Income (Loss) [Line Items]
Income (loss) before income taxes	$ (93,833)	$ (83,131)
Domestic
Pre-tax Income (Loss) [Line Items]
Income (loss) before income taxes	(129,740)	(119,031)
Foreign
Pre-tax Income (Loss) [Line Items]
Income (loss) before income taxes	$ 35,907	$ 35,900