Rate Reconciliation Between Amount of Income Tax Provision (Benefit) at Federal Rate and Provision (Benefit) from Taxes on Loss Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax benefit computed at the federal rate of 21%	$ (19,705)	$ (17,457)
Increase (reduction) in income taxes resulting from:
State and local income taxes (benefit), net of federal income tax	(115)	(1,998)
Non-controlling interest	(2,552)	(2,720)
Unrecognized tax benefits		(31)
Valuation allowance	21,756	22,752
Interest on income tax receivable	(1,253)
Non-deductible executive compensation	150	868
Foreign Earnings (rate differential)	8,300	13,405
US Tax Reform / rate reduction	23	(5,562)
Other, net	1,479	(2,719)
Total provision (benefit)	$ 8,083	$ 6,538