Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Current
Non-U.S.		$ 240
Total current		240
Deferred
U.S. federal	$ (8,551)	(9,164)
U.S. state	3,299	(1,903)
Total deferred	(5,252)	(11,067)
Valuation allowance	5,252	11,067
Total	$ 0	$ 240