Income Taxes - Schedule of Net Operating Loss Carryforwards Amounts by Jurisdiction and Year of Expiration (Detail) $ in Millions	Dec. 31, 2019 USD ($)
Brazil [Member] | Indefinite Expiration [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards by jurisdiction:	$ 4.3
Italy [Member] | Indefinite Expiration [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards by jurisdiction:	45.9
Malta [Member] | Indefinite Expiration [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards by jurisdiction:	8.2
United States [Member] | Expiration Year From 2025 - 2037 [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards by jurisdiction:	$ 46.1