Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Valuation allowance	$ 41,800,000
Operating loss carry forwards	113,410,000	$ 74,566,000
Remaining operating loss carryforwards	4,700,000
Unrecognized tax benefits	1,512,000	1,363,000	$ 1,202,000
Unrecognized tax benefits and interest accrued	0	$ 0
GILTI income tax	0
Domestic Tax Authority
Income Tax Contingency [Line Items]
Operating loss carry forwards	337,600,000
Operating loss carryforwards subject to expiration	254,500,000
Remaining operating loss carryforwards	83,100,000
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Operating loss carry forwards	287,500,000
Operating loss carryforwards subject to expiration	282,800,000
Foreign Tax Authority | Italy
Income Tax Contingency [Line Items]
Operating loss carry forwards	23,100,000
Foreign Tax Authority | Luxembourg
Income Tax Contingency [Line Items]
Operating loss carryforwards subject to expiration	95,100,000
Foreign Tax Authority | Switzerland
Income Tax Contingency [Line Items]
Operating loss carryforwards subject to expiration	42,300,000
Foreign Tax Authority | Japan
Income Tax Contingency [Line Items]
Operating loss carryforwards subject to expiration	2,000,000.0
Research Tax Credit Carryforward
Income Tax Contingency [Line Items]
Tax credit carry forward, amount	$ 6,800,000